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Conductor

Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the machine.

Try it

Controls

The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the pose of the hand starts and stops playback.

InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red

Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly. Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is Howler, which can change rate and volume on a playing track without restarting it.

Adapted from the Yoha draw demo.

Implementation notes

Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw position each frame makes the tempo shudder even while a hand is held still.

Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a slightly different playback rate on every frame is audible as a warble.

Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops out.

Requirements

Camera permission, and enough light for the tracker to find your hand.

Development

Run the application locally with yarn && yarn start.

Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages will serve it from.

About

Control music with your hands

p3zo.github.io/conductor/

Resources

Readme
MIT license
Activity

Stars

4 stars

Watchers

1 watching

Forks

0 forks
Report repository

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Conductor
Control music with your hands. Runs in a browser tab off a webcam, with nothing to install; the video never leaves the
machine.
Try it
Controls
The camera frame is the instrument. A cursor follows your hand; where it sits sets the tempo and the volume, and the
pose of the hand starts and stops playback.
InputEffect
Horizontal hand positionPlayback rate, from 0.5x to 1.5x
Vertical hand positionVolume, loudest at the top
PinchPlay. The cursor turns green
FistPause. The cursor turns red
Hand tracking is Yoha, running its models on TensorFlow.js in WebAssembly.
Every frame it returns the hand's landmarks and a probability for each pose it recognises. Playback is
Howler, which can change rate and volume on a playing track without restarting it.
Adapted from the Yoha draw demo.
Implementation notes
Smoothing. Tracking a hand at video rate is noisy, so the cursor follows an exponential moving average of the
tracked position (ExponentialCoordinateAverage(0.85)), weighted towards where the hand already was. Reading the raw
position each frame makes the tempo shudder even while a hand is held still.
Quantization. Rate and volume are rounded to a tenth, and applied only when the rounded value changes. Writing a
slightly different playback rate on every frame is audible as a warble.
Border padding. The tracked area is cropped in from the edges of the video by BORDER_PADDING_FACTOR, so the
extremes of each control sit inside the frame rather than at the edge of what the camera can see, where tracking drops
out.
Requirements
Camera permission, and enough light for the tracker to find your hand.
Development
Run the application locally with yarn && yarn start.
Push changes to the main branch, then run deploy.sh to build the application on the pages branch where gh-pages
will serve it from.
About
Control music with your hands
p3zo.github.io/conductor/
Resources
Readme
MIT license
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Contributors
Languages