InstaGrain
Granular synthesizer plugin (VST3/AU/LV2) built with JUCE.
Loads audio samples and splits them into tiny grains, manipulating position, size, density, pitch, and pan to create evolving textures and entirely new sounds. MIDI-controlled, polyphonic (8 voices), with drag & drop sample loading.
Features
- Granular Engine — 128 grain pool per voice, Hann windowing, linear interpolation
- 8-voice polyphony — MIDI note maps to pitch offset relative to configurable root note
- Root Note selector — set which MIDI note the loaded sample represents
- Scatter controls — randomize position, size, pitch, and pan per grain
- Direction modes — Forward, Reverse, PingPong
- Freeze — lock grain position for continuous texture generation
- ADSR envelope — per-voice amplitude shaping
- Global effects — State Variable filter (LP/HP/BP) + Reverb
- Sustain pedal — full MIDI CC64 support with proper voice management
- Sample rate correction — automatic pitch compensation for sample rate mismatches
- Waveform display — real-time grain visualization with position indicator and scatter range
- Drag & drop — load WAV, AIFF, MP3, FLAC, OGG files
- State save/restore — sample path and all parameters persist with DAW session
Build
Requires JUCE cloned at ../JUCE relative to this project.
cmake -B build -G "Visual Studio 17 2022" -A x64
cmake --build build --config Release
License
GPL-3.0