QPitch

QPitch is a JUCE pitch-correction audio plugin with VST3 and CLAP builds.

No bullshit, just a quick, easy to use auto-tuning plugin with formant preservation.

Detects the main frequency -> maps to midi -> pitch shifts -> corrects formants.

Watch the demo

Dependencies

• CMake 3.21+
• A C++17 compiler
• Git, for cloning submodules and optional CMake dependency fetching
• Runtime optional: Rubber Band Library (librubberband) for the higher-quality live pitch shifter. If it is not installed, QPitch falls back to its built-in phase-vocoder shifter.

Linux build packages vary by distro. On Ubuntu/Debian, start with:

sudo apt install build-essential cmake git pkg-config libx11-dev libxext-dev libxinerama-dev libxrandr-dev libxcursor-dev libfreetype-dev libfontconfig1-dev

Optional Rubber Band runtime:

sudo apt install librubberband2

Build

Clone with submodules so JUCE is available locally:

git clone --recurse-submodules https://github.com/Skynse/qpitch.git
cd qpitch

If you already cloned without submodules:

git submodule update --init --recursive

Then build:

cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build --target QPitch_VST3 QPitch_CLAP -j

Or with the included preset:

cmake --preset release
cmake --build --preset release

Build outputs:

• VST3: build/QPitch_artefacts/Release/VST3/QPitch.vst3
• CLAP: build/QPitch_artefacts/Release/CLAP/QPitch.clap

Build With Vendored Dependencies

JUCE is vendored as a Git submodule at JUCE/. clap-juce-extensions is fetched by CMake automatically unless a local clap-juce-extensions/ folder is present.

For a fully offline build, also vendor a compatible copy of:

• clap-juce-extensions/ including its clap-libs/clap and clap-libs/clap-helpers subfolders

Then configure with dependency fetching disabled:

cmake -S . -B build -DQPITCH_FETCH_DEPS=OFF -DCMAKE_BUILD_TYPE=Release
cmake --build build --target QPitch_CLAP -j

Notes

QPitch dynamically loads Rubber Band at runtime on Linux/macOS. This keeps builds simple and lets the plugin run without bundling Rubber Band, but the best sound quality expects the runtime library to be installed on the user machine.

Release

GitHub Releases are created by the release workflow. Push a version tag:

git tag v1.2.0
git push origin v1.2.0

The workflow builds Linux, macOS, and Windows VST3/CLAP packages and uploads:

• QPitch-<version>-linux-vst3.zip
• QPitch-<version>-linux-clap.zip
• QPitch-<version>-macos-universal-vst3.zip
• QPitch-<version>-macos-universal-clap.zip
• QPitch-<version>-windows-vst3.zip
• QPitch-<version>-windows-clap.zip

You can also run the release workflow manually from GitHub Actions and provide a version like v1.2.0.