A modern, open-source sampler plugin built with iPlug2 framework.
OpenSampler is a professional-grade audio sampler instrument plugin supporting multiple formats including VST3, CLAP, and Standalone applications. Built with modern C++17 and leveraging the powerful iPlug2 framework for cross-platform compatibility.
- Multi-format Support: VST3, CLAP, and Standalone (APP)
- Polyphonic Playback: Up to 32 simultaneous voices with intelligent voice stealing
- ADSR Envelope: Full Attack, Decay, Sustain, Release controls
- Sample Management: Load and manage multiple samples with velocity and key mapping
- Modern UI: Clean, responsive interface built with Inter font family
- MIDI Support: Full MIDI input handling with note on/off and control messages
- Cross-platform: Windows, macOS, and Linux support
OpenSampler/
├── Application.cpp # Main plugin entry point
├── config.h # Plugin configuration and metadata
├── CMakeLists.txt # Main CMake build configuration
├── CMake/ # CMake modules and find scripts
│ ├── CompilerOptions.cmake # Compiler-specific settings
│ ├── PluginConfig.cmake # Plugin build options
│ ├── FindFluidSynth.cmake # FluidSynth finder
│ └── FindSfizz.cmake # Sfizz finder
├── Core/ # Audio engine implementation
│ └── OSMPEngine.cpp
├── Graphic/ # GUI implementation
│ ├── OSMPGui.cpp
│ └── Resources/
│ ├── Fonts/Inter/ # Inter font family
│ ├── Vectors/Lucide/ # Lucide icon set
│ ├── Images/ # Image resources
│ ├── Samples/ # Demo samples
│ └── Presets/ # Factory presets
├── include/ # Header files
│ ├── Core/
│ │ └── OSMPEngine.hpp
│ └── Graphic/
│ └── OSMPGui.hpp
├── Modules/ # Additional plugin modules
├── External/ # External dependencies
│ ├── iPlug2/ # iPlug2 framework
│ ├── fluidsynth/ # FluidSynth library
│ ├── sfizz/ # Sfizz SFZ player
│ ├── zynaddsubfx/ # ZynAddSubFX synthesizer
│ └── NeuralAmpModelerCore/ # Neural Amp Modeler
├── Tests/ # Unit tests
├── Docs/ # Documentation
└── Build/ # Build output directory
- CMake 3.15 or higher
- C++17 compatible compiler (MSVC 2019+, GCC 9+, Clang 10+)
- Git with submodules initialized
cd OpenSampler
cmake -B Build -G "Visual Studio 17 2022"
cmake --build Build --config Releasecd OpenSampler
cmake -B Build -DCMAKE_BUILD_TYPE=Release
cmake --build BuildConfigure build options using CMake:
cmake -B Build \
-DOPENSAMPLER_BUILD_VST3=ON \
-DOPENSAMPLER_BUILD_CLAP=ON \
-DOPENSAMPLER_BUILD_STANDALONE=ON \
-DOPENSAMPLER_USE_FLUIDSYNTH=OFF \
-DOPENSAMPLER_USE_SFIZZ=OFFAvailable options:
OPENSAMPLER_BUILD_VST3- Build VST3 plugin (default: ON)OPENSAMPLER_BUILD_CLAP- Build CLAP plugin (default: ON)OPENSAMPLER_BUILD_STANDALONE- Build standalone app (default: ON)OPENSAMPLER_BUILD_AU- Build AudioUnit (macOS only, default: OFF)OPENSAMPLER_USE_FLUIDSYNTH- Enable FluidSynth support (default: OFF)OPENSAMPLER_USE_SFIZZ- Enable Sfizz SFZ support (default: OFF)OPENSAMPLER_BUILD_TESTS- Build unit tests (default: OFF)
Core Engine (OSMPEngine)
- Sample management and loading
- Voice allocation and polyphony
- ADSR envelope processing
- Audio rendering and mixing
GUI (OSMPGui)
- Parameter controls (knobs, sliders)
- Visual feedback and metering
- Sample browser and management
- Preset management
- Implement core functionality in
Core/OSMPEngine.cpp - Add GUI controls in
Graphic/OSMPGui.cpp - Wire parameters in
Application.cpp - Update
config.hif needed
- iPlug2: Plugin framework (ZLib License)
- FluidSynth: SoundFont synthesizer (LGPL)
- Sfizz: SFZ format player (BSD-2)
- ZynAddSubFX: Software synthesizer (GPL)
- Inter Font: UI typography (OFL)
- Lucide Icons: Icon set (ISC)
This Project is MIT License
Contributions are welcome! Please read our contributing guidelines before submitting pull requests.
- Website: https://github.com/arizkami/opensampler
- Email: info@opensampler.app
- iPlug2 framework by Oli Larkin and Alex Harker
- Inter typeface by Rasmus Andersson
- Lucide icon set