A free, professional singing-voice-synthesis editor powered by DiffSinger

Visit https://diffscope.org/ for more details.

Nightly builds are available to download, but are unstable and do not yet include all features.

Visit https://diffscope.org/downloads/#diffscope to download.

• Singing synthesis: DiffSinger synthesis through a local DiffSinger Synthesis Program (DSSP) service or a remote DiffScope Synthesis Platform (DSSP) API, with voice package installation and per-stage resynthesis.
• Note editing: A piano roll for notes, lyrics, phonemes, synthesis parameters, and pitch curves, including freehand and line pitch drawing, pitch fixing, transform, and erasing.
• Arrangement: Multi-track timeline with singing clips, audio clips, labels, and variable tempo/time signature/key signature events, plus loop playback, metronome, and MIDI recording.
• Mixed singers: Multiple singers per singing clip with weighted ratios, time-varying voice blending, and reusable presets.
• Mixing and effects: Per-track volume, pan, mute, and solo controls, effect chains on tracks and the master bus, offline time stretching and pitch shifting, and mixed or stem export in multiple audio formats.
• Audio extraction: Derives notes, pitch curves, and tempo from audio clips and separates clips into stems through DSSP services.
• Interchange: Imports and exports MIDI and multiple formats via LibreSVIP, and exports lyrics as plain text or timed text.

• Basic SVS editor experience
• Scripting and MCP
• VST bridge
• Plugin SDK

1. Install essential tools for C/C++ development and Qt.
2. Clone this repository recursively.

git clone --recursive https://github.com/diffscope/diffscope-project.git

3. Install dependencies via Vcpkg with vcpkg-workspace.cmake, downloaded into scripts/. The script checks out vcpkg and the overlays that scripts/vcpkg-sources.json specifies into deps/, and installs the dependencies there. It runs on Windows, macOS and Linux.

curl -fsSL -o scripts/vcpkg-workspace.cmake https://raw.githubusercontent.com/stdware/dev-scripts/main/scripts/vcpkg-workspace.cmake
cmake -P scripts/vcpkg-workspace.cmake install --qt-dir /path/to/Qt/lib/cmake/Qt6

Or with PowerShell:

Invoke-WebRequest -OutFile scripts/vcpkg-workspace.cmake https://raw.githubusercontent.com/stdware/dev-scripts/main/scripts/vcpkg-workspace.cmake
cmake -P scripts/vcpkg-workspace.cmake install --qt-dir /path/to/Qt/lib/cmake/Qt6

cmake -P scripts/vcpkg-workspace.cmake help lists the other commands. --dry-run prints the commands without running them. scripts/vcpkg-sources.local.json takes precedence over scripts/vcpkg-sources.json, for example to use a local overlay.

4. Build using CMake with the vcpkg toolchain in deps/.

cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=deps/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_PREFIX_PATH=/path/to/Qt

You may refer to CI scripts for more details.

This repository uses multiple licenses. See LICENSE for the component license index and the LICENSES directory for the complete license texts.