Audio to MIDI Converter Online
Turn any audio recording into editable MIDI notes — upload MP3 or WAV, preview the transcription, fine-tune it, and download, all in your browser.
- MP3 / WAV
- Piano roll preview
- Sheet music export
Click a note to hear it
What is audio to MIDI?
Audio to MIDI is the general process of converting any recorded sound — an MP3, WAV, stem, or voice memo — into MIDI notes. Where the audio file stores a waveform, the MIDI file stores the underlying performance: which notes played, when, and how hard, all fully editable after the fact.
A transcription model estimates the pitches in your recording and lays them out on a timeline. From there the notes are yours to quantize, transpose, re-voice with any instrument, or export as a score — the recording becomes raw material instead of a finished, fixed track.
How it works
Upload your audio
Drop an MP3 or WAV recording. No account needed to convert and preview — transcription starts instantly in the browser.
Preview and fine-tune
Listen to the transcription on an interactive piano roll, compare it against the original audio, and adjust detection sensitivity, minimum note length, or pitch bends to re-transcribe.
Download MIDI or sheet music
Download the MIDI file, correct wrong notes directly on the roll, or export sheet music as MusicXML/PDF for MuseScore, Sibelius, or printing.
Formats & limits
- Input formats
- Audio
- Output
- MIDI
- File limits
- 50 MB · 10 min
- Price
- Free · no sign-up
Highlights
Any common audio in
Bring MP3, WAV, and other everyday recordings through a single uploader.
Editable timeline
Every detected note is movable, deletable, and transposable on the piano roll.
Export anywhere
Save as .mid for your DAW, or MusicXML/PDF for notation software.
Getting the cleanest transcription
- Audio to MIDI works best on monophonic sources — a single melody line such as vocals, flute, or lead guitar transcribes far more accurately than a dense mix.
- Trim intros, applause, and silence before uploading — cleaner input means fewer ghost notes.
- If you hear extra notes, lower the detection sensitivity; if soft notes are missing, raise it and re-transcribe.
- AI transcription is a starting point. Use the built-in editor to fix the handful of wrong notes instead of re-recording.
Frequently asked questions
What is audio to MIDI conversion?
Audio to MIDI conversion listens to a recording and detects the pitches and timing of the notes being played, then writes them out as a MIDI file you can edit, re-instrument, or turn into sheet music.
What audio formats can I convert to MIDI?
MP3 and WAV uploads up to 50 MB. For best results use dry, monophonic recordings — a single melodic line without heavy accompaniment.
Is this audio to MIDI converter free?
Yes. You can convert and preview audio to MIDI online for free without creating an account. Signing in additionally saves results to your history and unlocks editing and sheet music export.
How accurate is the transcription?
The transcription is powered by Spotify's Basic Pitch neural network. Clean, single-melody recordings come out nearly perfect; polyphonic or noisy audio will contain some wrong notes, which you can fix in the built-in piano-roll editor or by re-transcribing with tuned parameters.