Free AI Audio to MIDI Converter
Turn the notes in any audio into MIDI with AI, and preview them on a piano roll before you download. Your audio is processed in your browser and never uploaded.
Your audio is analyzed in your browser and never uploaded to a server.
Your MIDI
Choose an audio file and click Convert to MIDI. The notes will appear here.
How to Convert Audio to MIDI
Three steps, all in your browser.
Choose an audio file
Pick an MP3, WAV, M4A or OGG file from your device, or drag it onto the upload box. Clips with a clear melody work best.
Click Convert to MIDI
An AI model works through the audio in your browser, finding pitches and note starts, and shows its progress as it goes.
Preview and download
Check the notes on the piano roll, then download the .mid file and open it in any DAW.
Why Use the SonusVid Audio to MIDI Converter
AI Transcription in Your Browser
The transcription model runs on your device and picks up several notes at once, not just a single melody.
Your File Never Leaves Your Device
Your audio is never uploaded to any server. The model is only about 1 MB, so it loads quickly.
See the Notes Before You Download
The result is drawn as a piano roll, time across and pitch up the side, so you can tell at a glance whether it caught the tune.
A Standard MIDI File
The .mid opens in FL Studio, Ableton, Logic, GarageBand or any other DAW, where you can change the instrument and edit every note.
Free and Unlimited
No sign-in and no credits. Files up to 50MB and 7 minutes.
One Click to a Music Video
Once it's converted, take the same song straight into the music video generator without choosing the file again.
Audio to MIDI: How It Works and How to Get Good Results
What is MIDI?
MIDI is not sound but a record of a performance: each note's pitch, when it starts, how long it lasts and how hard it is played. When MIDI plays, software or an electronic instrument makes the sound from that record, so the same MIDI file can be played on piano or switched to strings or a synth.
Audio to MIDI works the other way round: it listens to a recording and writes those notes down. This tool uses Basic Pitch, an open-source AI model from Spotify. It splits the audio into very short frames, estimates which pitches sound in each frame and where notes begin, then joins consecutive frames into notes.
The MIDI you get holds notes only, not the instrument's tone, the reverb or a singer's words. It is useful for working out a melody, capturing an idea, or moving a part onto another instrument.
What audio converts well
Clean recordings of one instrument at a time convert best: solo piano, a single guitar or synth line, humming or an unaccompanied voice, an isolated bass part. When notes have clear edges, the model can place their starts and lengths well.
Full mixes are much harder. With drums, bass, chords, vocals and effects stacked together, the model treats everything as notes and the result is often cluttered. If you only want one part, separate it with a stem splitter first and convert that instead.
Drums and percussion have no clear pitch, so this tool is not meant for them. Heavy reverb, distortion or sliding notes also break notes into fragments; when that happens, delete the stray short notes in your DAW and quantize the rest.
Using the MIDI file
Drag the .mid file into FL Studio, Ableton Live, Logic Pro, GarageBand or any other DAW and it becomes a MIDI track. Give the track an instrument and you will hear the transcribed melody.
Notes sit at the recording's real times and the file is written at 120 BPM, so they may not line up with your DAW's grid. To tidy the timing, quantize them, or use your DAW's tempo detection to match the original song.
Treat the transcription as a starting point rather than a finished part. Listen through, delete extra notes, add any it missed and adjust the velocities, and you will have MIDI you can arrange with.
What to Expect from Different Sources
Same model: the simpler the source, the cleaner the notes.
| Source | What to expect |
|---|---|
| Solo piano | Notes and chords come through, ready to edit |
| Humming or a cappella voice | A clear melody, with some fragments on slides |
| One instrument line (guitar, synth, bass) | Usually clean |
| Strummed guitar | Most chord notes found; the rhythm needs tidying |
| Full band mix | Cluttered; separate the part first |
| Drums and percussion | Not supported: no clear pitch |
- Recording quality matters too: the less reverb and background noise, the cleaner the result.
Audio to MIDI FAQ
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Got the notes?
Give the song a video.
Upload the same song and AI builds a full music video around its rhythm and mood.