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Producers & DAW users
Pull a melody or bassline out of a reference track and rebuild it with your own instruments — no re-playing it by hand.
Convert audio to MIDI
Upload a song and get an editable MIDI file in about a minute.
Your MIDI files
Your conversions stay here. Uploaded audio is kept for 30 days.
Convert MP3 to MIDI
Turn any MP3, WAV, M4A, OGG or FLAC into an editable MIDI file. Lacuna's free audio to MIDI converter transcribes the notes with AI, shows them on an interactive piano roll, and lets you download the .mid in seconds.
How it works
From audio to a MIDI file in three steps
1Step 1
Upload your audio
Drop in any MP3, WAV, M4A, OGG or FLAC — a full song, a hummed melody, or a single instrument recording. Files up to 30 MB and 10 minutes.
2Step 2
AI transcribes to MIDI
Lacuna listens to the audio, detects the pitch and timing of every note, and rebuilds them as real MIDI events — not just a waveform.
3Step 3
Preview and download
Play the result back on an interactive piano roll, then download a standard .mid file ready to drop into any DAW, sampler or soundfont.
What you get
A real audio to MIDI converter, not a re-wrapper
Everything you need to turn a recording into editable notes — accurate pitch detection, an interactive piano roll, and a clean .mid you actually own.
Real, editable MIDI notes
The converter detects the actual pitch, start time and length of every note and writes them as MIDI events. Open the .mid in your DAW and every note is fully editable — quantize it, transpose it, swap the instrument.
Interactive piano roll
Before you download, play the transcription back on a built-in piano roll with real instrument sound. See exactly what was detected and hear how close it is to the original.
MP3, WAV, M4A, OGG and FLAC
Convert MP3 to MIDI or bring in WAV, M4A, OGG and FLAC — the same pipeline handles them all. No format juggling, no separate wav to midi tool.
Download a clean .mid
Get a standard MIDI file that works everywhere — Ableton, FL Studio, Logic, GarageBand, MuseScore, or any soundfont player. It's yours to keep and use however you like.
Who it's for
Made for anyone who needs the notes, not just the sound
From producers rebuilding a sample to students figuring out a melody by ear — turn audio into MIDI you can work with.
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Musicians learning by ear
Find the notes of a song you're learning. Convert it to MIDI, watch the piano roll, and see exactly which notes are played.
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Remixers & beatmakers
Turn a hummed idea or an old recording into MIDI, then chop, re-voice and remix it however you want.
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Teachers & students
Convert a performance into notes for practice, notation or analysis — a fast starting point for transcription work.
FAQ
MP3 to MIDI, answered
Upload your MP3 to the converter above and hit Convert. Lacuna's AI transcribes the notes and builds a MIDI file automatically — no manual note entry. Preview it on the piano roll, then download the .mid. The same works for WAV, M4A, OGG and FLAC.
Yes — Lacuna is free to start, so you can convert audio to MIDI at no cost and download the .mid. Upgrade later if you need more conversions.
Yes. The same audio to MIDI pipeline accepts MP3, WAV, M4A, OGG and FLAC, so you don't need a separate wav to midi or m4a to midi tool — just upload whatever you have.
It's most accurate on single-instrument audio and clear lead melodies — piano, solo vocals, a hummed line, a bassline. Dense full-band mixes, heavy layering and drums are harder to separate, so expect to clean up a few notes in your DAW. It's a fast starting point, not a perfect transcription of a whole mix.
Open the .mid in any DAW (Ableton, FL Studio, Logic, GarageBand), notation software like MuseScore, or a soundfont player. Because it's real MIDI, you can change the instrument, transpose, quantize, or edit individual notes — that's the whole point of converting mp3 to midi instead of just resampling the audio.
You can upload one, but MIDI transcription works best on a single instrument or the lead melody. In a busy mix the AI will focus on the most prominent notes and may miss or merge some — for the cleanest result, feed it a stem or an isolated part.
Turn your audio into MIDI
Convert MP3 to MIDI free — preview it on the piano roll and download the .mid in seconds.