Free Music Demixer

Free Music Demixer is an audio editing tool that turns songs into piano sheet music, MIDI, guitar tabs and separated stems. Browser-based tool that separates songs into six stems and converts audio into piano sheet music, MIDI, drum MIDI, guitar tabs and karaoke files.

Free Music Demixer, branded on its own pages as Music Demixer, is a browser-based service that splits a recording into its parts and then converts the part you pick into files for practice, arranging, production or notation. Upload a full song, an already separated stem or a solo recording, and the site produces stems, MIDI, PDF scores, MusicXML or guitar tab drafts depending on the task chosen. The toolset is organised around six workflows: Sheet Music, All Stems, Drum Kit, MIDI, Guitar Tab, and Vocal & Karaoke Tools. Stem separation yields six tracks (vocals, drums, bass, piano, guitar and an Other stem for flute, strings, brass or synths) with MP3, Opus or WAV downloads. Drum tools can isolate the kit, split it into four to six pieces, or generate editable Drum MIDI. Vocal options cover lead versus backing separation, a beta duet mode, and karaoke backing with synced lyrics. Guitar tabs export as .gp5 files in a chosen tuning, and multi-track MIDI places several instruments in one editable file. In practice, the user answers a short set of questions: what output is wanted, whether the upload is a full mix or an isolated instrument, and optional settings such as tuning, tempo or audio format. A cloud service processes the job, and the results page offers file downloads, a score preview and a stem mixer with presets such as karaoke or drum practice. The site states that detected notes, rhythm, layout, lyrics and tabs may need manual cleanup, and that guitar tab and duet vocals are still beta. The audience is mainly musicians, students, teachers, producers and arrangers who want a starting draft rather than a finished score. Compared with stem-only splitters, it bundles transcription and notation exports for editors such as MuseScore, Dorico, Finale and Sibelius. Pricing is credit based: one free preview limited to a 30-second result, a five-job pack, or an unlimited monthly subscription. The site also publishes comparison pages against Melody Scanner and Spleeter.