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Backing Track Trigger

A simple one-shot VST3 sampler plugin designed for MuseScore 4. Load a long WAV file (backing track, stem, vocal part) and trigger playback with any MIDI note.

Features

  • One-Shot Playback: Plays the entire sample from start to finish
  • Any MIDI Note Triggers: No pitch variation - all notes play at original pitch
  • Restart on New Note: Send another note to restart from the beginning
  • Stop on Note-Off: Release the key to stop playback
  • Waveform Display: Visual representation of your loaded sample
  • Supports Multiple Formats: WAV, AIFF, MP3, FLAC, OGG

Use Case

Perfect for playing backing tracks synchronized with your MuseScore score. Simply:

  1. Add this plugin as an instrument track
  2. Load your backing track WAV file
  3. Place a single whole note at the start of your score
  4. Press play - your backing track plays in sync!

Building

Prerequisites

  • macOS with Xcode installed
  • CMake 3.22 or later

Build Commands

# Configure the build
cmake -B build -G Xcode

# Build the plugin
cmake --build build --config Release

The built plugin will be automatically copied to your system's VST3 folder.

Manual Installation

If needed, copy the plugin manually:

cp -r build/BackingTrackTrigger_artefacts/Release/VST3/BackingTrackTrigger.vst3 \
      /Library/Audio/Plug-Ins/VST3/

License

MIT License - Feel free to use and modify.