Muse

What Muse is

Muse is a desktop app that converts recorded or uploaded audio into MIDI. Its solo-piano workflow separates piano from a mix, transcribes notes, and divides them between left and right hands. Multi-instrument mode transcribes up to 13 tracks in one pass without source separation. You can record with a microphone or import MP3, WAV, OGG, or FLAC files. Built-in playback uses a grand piano synth and lets you mute or solo each track. Muse processes audio locally, and its maker says audio never leaves the user's machine. GPU acceleration supports CUDA and Apple Silicon MPS. Builds are listed for Windows, macOS on Apple Silicon and Intel, and Linux Debian/Ubuntu and AppImage. The project is open-source under the MIT license and costs nothing. Setup requires Python 3.10 or later, and first run downloads about 3 GB of machine-learning models. The maker estimates multi-instrument CPU inference at roughly two minutes per 30 seconds of audio, with a significant difference from GPU acceleration. Piano transcription can be less accurate on synth piano, electric piano, and sounds unlike a concert grand. MIDI output is available; MusicXML export is on the roadmap.