Replace slider translation exponent with cubic-bezier curve presets + custom curve

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->

ControlPad/EventHandler.cs

@@ -102,7 +102,7 @@
  {
  if (IsPressed && !IsPressedOld)
  { 
  AudioController.MuteProcess(buttonAction.ActionProperty, !AudioController.IsProcessMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -118,7 +118,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  AudioController.MuteMic(buttonAction.ActionProperty, !AudioController.IsMicMute(buttonAction.ActionProperty));
  }
  break;
  }
@@ -126,7 +126,7 @@
  {
  if (IsPressed && !IsPressedOld)
  {
  string path = buttonAction.ActionProperty;
  try
  {
  Process.Start(new ProcessStartInfo
@@ -183,7 +183,14 @@
 
  private float SliderToFloat(int value, int mode = 0)
  {
- return SliderValueConverter.SliderToFloat(value, Settings.TranslationExponent);
+ value -= 1;
+ float normalized = Math.Clamp((float)value / 1022.0f, 0f, 1f);
+
+ // Clamp to zero when slider is at or near the bottom to ensure complete silence
+ if (normalized < 0.005f)
+ return 0f;
+
+ return SliderTranslationCurve.Apply(normalized);
  }
  }
 }

ControlPad/Settings.cs

@@ -15,6 +15,11 @@ public static class Settings
  private static bool _startMinimized = false;
  private static bool _minimizeToSystemTray = true;
  private static double _translationExponent = 1d;
+ private static string _translationCurvePreset = "linear";
+ private static double _translationCurveX1 = 0d;
+ private static double _translationCurveY1 = 0d;
+ private static double _translationCurveX2 = 1d;
+ private static double _translationCurveY2 = 1d;
  private static int _selectedThemeIndex = 0;
  private static int _selectedBackgroundIndex = 3;
  private static int _sliderDeadZone = 4;
@@ -115,13 +120,68 @@ public static double TranslationExponent
  }
  }
 
+ public static string TranslationCurvePreset
+ {
+ get => _translationCurvePreset;
+ set
+ {
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(value) ? value : "linear";
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX1
+ {
+ get => _translationCurveX1;
+ set
+ {
+ _translationCurveX1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY1
+ {
+ get => _translationCurveY1;
+ set
+ {
+ _translationCurveY1 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveX2
+ {
+ get => _translationCurveX2;
+ set
+ {
+ _translationCurveX2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
+ public static double TranslationCurveY2
+ {
+ get => _translationCurveY2;
+ set
+ {
+ _translationCurveY2 = Math.Clamp(value, 0d, 1d);
+ Save();
+ }
+ }
+
  private class Data
  {
  public bool TrayIconMessageShown { get; set; } = false;
  public bool StartWithWindows { get; set; } = false;
  public bool StartMinimized { get; set; } = true;
  public bool MinimizeToSystemTray { get; set; } = true;
  public double TranslationExponent { get; set; } = 1d;
+ public string TranslationCurvePreset { get; set; } = "linear";
+ public double TranslationCurveX1 { get; set; } = 0d;
+ public double TranslationCurveY1 { get; set; } = 0d;
+ public double TranslationCurveX2 { get; set; } = 1d;
+ public double TranslationCurveY2 { get; set; } = 1d;
  public int SelectedThemeIndex { get; set; } = 0;
  public int SelectedBackgroundIndex { get; set; } = 3;
  public int SliderDeadZone { get; set; } = 4;
@@ -148,6 +208,11 @@ public static void Load()
  _selectedBackgroundIndex = data.SelectedBackgroundIndex;
  _sliderDeadZone = data.SliderDeadZone;
  _translationExponent = data.TranslationExponent;
+ _translationCurvePreset = SliderTranslationCurve.IsSupportedPreset(data.TranslationCurvePreset) ? data.TranslationCurvePreset : "linear";
+ _translationCurveX1 = Math.Clamp(data.TranslationCurveX1, 0d, 1d);
+ _translationCurveY1 = Math.Clamp(data.TranslationCurveY1, 0d, 1d);
+ _translationCurveX2 = Math.Clamp(data.TranslationCurveX2, 0d, 1d);
+ _translationCurveY2 = Math.Clamp(data.TranslationCurveY2, 0d, 1d);
  _unmuteOnSliderChange = data.UnmuteOnSliderChange;
  }
  catch
@@ -170,6 +235,11 @@ private static void Save()
  SelectedBackgroundIndex = _selectedBackgroundIndex,
  SliderDeadZone = _sliderDeadZone,
  TranslationExponent = _translationExponent,
+ TranslationCurvePreset = _translationCurvePreset,
+ TranslationCurveX1 = _translationCurveX1,
+ TranslationCurveY1 = _translationCurveY1,
+ TranslationCurveX2 = _translationCurveX2,
+ TranslationCurveY2 = _translationCurveY2,
  UnmuteOnSliderChange = _unmuteOnSliderChange,
  };
 
@@ -183,4 +253,4 @@ private static void Save()
  }
  }
  }
-}
+}

ControlPad/SliderTranslationCurve.cs

@@ -0,0 +1,104 @@
+namespace ControlPad
+{
+ public static class SliderTranslationCurve
+ {
+ private const double Epsilon = 1e-6;
+ private const int MaxBisectionIterations = 20;
+ private static string? _lastPreset;
+ private static double _lastX1;
+ private static double _lastY1;
+ private static double _lastX2;
+ private static double _lastY2;
+ private static (double x1, double y1, double x2, double y2) _cachedControlPoints = (0d, 0d, 1d, 1d);
+
+ public static bool IsSupportedPreset(string? preset)
+ {
+ return preset is "ease" or "linear" or "ease-in" or "ease-out" or "ease-in-out" or "custom";
+ }
+
+ public static (double x1, double y1, double x2, double y2) GetPresetControlPoints(string preset)
+ {
+ return preset switch
+ {
+ "ease" => (0.25d, 0.1d, 0.25d, 1d),
+ "linear" => (0d, 0d, 1d, 1d),
+ "ease-in" => (0.42d, 0d, 1d, 1d),
+ "ease-out" => (0d, 0d, 0.58d, 1d),
+ "ease-in-out" => (0.42d, 0d, 0.58d, 1d),
+ _ => (0d, 0d, 1d, 1d),
+ };
+ }
+
+ public static float Apply(float input)
+ {
+ double t = Math.Clamp(input, 0f, 1f);
+ var controlPoints = GetControlPoints();
+
+ return (float)Evaluate(controlPoints.Item1, controlPoints.Item2, controlPoints.Item3, controlPoints.Item4, t);
+ }
+
+ private static (double x1, double y1, double x2, double y2) GetControlPoints()
+ {
+ string preset = Settings.TranslationCurvePreset;
+ double x1 = Settings.TranslationCurveX1;
+ double y1 = Settings.TranslationCurveY1;
+ double x2 = Settings.TranslationCurveX2;
+ double y2 = Settings.TranslationCurveY2;
+
+ if (_lastPreset == preset && _lastX1 == x1 && _lastY1 == y1 && _lastX2 == x2 && _lastY2 == y2)
+ return _cachedControlPoints;
+
+ _cachedControlPoints = preset == "custom"
+ ? (x1, y1, x2, y2)
+ : GetPresetControlPoints(preset);
+
+ _lastPreset = preset;
+ _lastX1 = x1;
+ _lastY1 = y1;
+ _lastX2 = x2;
+ _lastY2 = y2;
+ return _cachedControlPoints;
+ }
+
+ private static double Evaluate(double x1, double y1, double x2, double y2, double xTarget)
+ {
+ x1 = Math.Clamp(x1, 0d, 1d);
+ x2 = Math.Clamp(x2, 0d, 1d);
+ y1 = Math.Clamp(y1, 0d, 1d);
+ y2 = Math.Clamp(y2, 0d, 1d);
+ xTarget = Math.Clamp(xTarget, 0d, 1d);
+
+ if (xTarget <= 0d)
+ return 0d;
+ if (xTarget >= 1d)
+ return 1d;
+
+ double lower = 0d;
+ double upper = 1d;
+ double t = xTarget;
+
+ for (int i = 0; i < MaxBisectionIterations; i++)
+ {
+ t = (lower + upper) * 0.5d;
+ double x = Bezier(t, 0d, x1, x2, 1d);
+ if (Math.Abs(x - xTarget) < Epsilon)
+ break;
+ if (x < xTarget)
+ lower = t;
+ else
+ upper = t;
+ }
+
+ return Bezier(t, 0d, y1, y2, 1d);
+ }
+
+ private static double Bezier(double t, double p0, double p1, double p2, double p3)
+ {
+ double oneMinusT = 1d - t;
+ return oneMinusT * oneMinusT * oneMinusT * p0
+ + 3d * oneMinusT * oneMinusT * t * p1
+ + 3d * oneMinusT * t * t * p2
+ + t * t * t * p3;
+ }
+ }
+}

ControlPad/UI Elements/SettingsUserControl.xaml

@@ -130,31 +130,74 @@
  Unchecked="cb_UnmuteOnSliderChange_Checked"/>
  </Grid>
 
- <!-- Translation Exponent -->
+ <!-- Translation Curve -->
  <Grid Margin="0,8,0,0" Grid.Row="5">
  <Grid.ColumnDefinitions>
  <ColumnDefinition/>
  <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
 
  <StackPanel Orientation="Vertical" Margin="0,0,16,0">
- <Label Content="Translation _exponent"
- Padding="0"
- Target="{Binding ElementName=ThemeComboBox}"/>
- <Label Content="Exponent controlling the mapping curve from slider to&#x0a;sound bar."
+ <Label Content="Translation _curve"
+Padding="0"
+Target="{Binding ElementName=TranslationCurvePresetComboBox}"/>
+ <Label Content="Curve controlling mapping from slider tosound level."
  Padding="0"
  Foreground="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
  </StackPanel>
 
- <ui:NumberBox x:Name="nb_TranslationExponent"
- PlaceholderText="1.0" 
- Grid.ColumnSpan="2" 
- Margin="367,0,0,0" 
- Value="1.0"
- SmallChange="0.1"
- Minimum="0.1"
- ValidationMode="InvalidInputOverwritten" ValueChanged="nb_TranslationExponent_ValueChanged"
- />
+ <StackPanel Grid.Column="1" Orientation="Vertical" MinWidth="180">
+ <ComboBox x:Name="TranslationCurvePresetComboBox"
+ SelectedIndex="1"
+ VerticalAlignment="Center"
+ SelectionChanged="TranslationCurvePresetComboBox_SelectionChanged">
+ <ComboBoxItem Content="ease"/>
+ <ComboBoxItem Content="linear"/>
+ <ComboBoxItem Content="ease-in"/>
+ <ComboBoxItem Content="ease-out"/>
+ <ComboBoxItem Content="ease-in-out"/>
+ <ComboBoxItem Content="custom"/>
+ </ComboBox>
+
+ <UniformGrid x:Name="CustomCurveGrid" Columns="2" Rows="2" Margin="0,8,0,0">
+ <ui:NumberBox x:Name="nb_CurveX1"
+ PlaceholderText="x1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY1"
+ PlaceholderText="y1"
+ Value="0.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,6"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveX2"
+ PlaceholderText="x2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="0,0,6,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ <ui:NumberBox x:Name="nb_CurveY2"
+ PlaceholderText="y2"
+ Value="1.0"
+ Minimum="0"
+ Maximum="1"
+ SmallChange="0.01"
+ Margin="6,0,0,0"
+ ValidationMode="InvalidInputOverwritten"
+ ValueChanged="nb_CustomCurve_ValueChanged"/>
+ </UniformGrid>
+ </StackPanel>
  </Grid>
 
  <!-- App Theme -->