Lowell's Music Tool Kit

Upload piano or instrument audio to convert it into MIDI.

Lock App

Drop audio here or choose a file MP3, WAV, M4A, and browser-decodable audio. Clear piano or single-instrument tracks work best.

Conversion server

Conversion is approximate

Your phone uploads audio to the conversion server. The server runs Basic Pitch and sends back MIDI notes for practice.

Upload MIDI Download MIDI

Practice Screen Convert a song to begin

Practice filter View Original audio

Speed 100%

0:00 / 0:00

Drop music here or choose a file Split a song into vocals, drums, bass, guitar, piano, and other stems with Demucs.

Remove vocals Download instrumental / karaoke audio Remove drums Download the song without drums Remove bass Download the song without bass Remove guitar Download the song without guitar Remove piano Download the song without piano Remove other Remove extra instruments outside the main stems Separate all stems Download vocals, drums, bass, guitar, piano, and other instead

Music splitting needs the API server

The server must have Demucs installed. First run may download the model and can take several minutes.

Drop the complete song here The instruments provide the chord progression. The lead vocal is isolated automatically and kept unchanged.

Automatic chord-aware harmony

The app detects the song's chords over time, follows the lead melody, creates chord-aware alto and tenor voices, and smooths large note jumps.

Drop audio here or choose a file Trim a specific part, preview it, then download a WAV cut.

Start 0:00 End 0:00

Drop music here or choose a file Find basic major/minor chords and follow them while the song plays.