MP3 to MIDI Converter
Drop in a song, a recording or a hum. Watch the notes fall onto a piano as it plays, then download a MIDI file for your DAW — converted right here in your browser.
Instrument sounds: FluidR3 GM soundfont by Frank Wen (CC BY 3.0, via gleitz/midi-js-soundfonts) and Salamander Grand Piano by Alexander Holm (CC BY 3.0). Note detection: Spotify basic-pitch (Apache 2.0).
How to convert MP3 to MIDI
- 1. Load your audio. Drop an MP3, WAV, M4A, FLAC or OGG file onto the screen, choose one, or press Record and sing or play into your microphone.
- 2. Tell it what you're converting. Vocals and bass are read one note at a time; piano and guitar keep chords; Full song tries to catch everything.
- 3. Convert, listen, download. Press Convert to MIDI. Play it back — each note lights its key as it sounds, so you can hear and see what was picked up. Switch between Audio and MIDI to compare with your recording, then download the .mid file.
What converts well
The converter listens for pitches and turns each one into a note with a start, a length and a loudness. It works best when one instrument is playing:
- A sung or hummed melody — great for getting an idea out of your head and into a DAW.
- Solo piano or keys — chords come through as stacked notes.
- A guitar part or a bass line recorded on its own.
Full mixes with drums, several instruments and reverb produce lots of extra notes. You'll get a starting point, not a clean score. Lowering Note sensitivity and raising Shortest note helps clear it up.
MP3 vs MIDI: what you actually get
An MP3 is a recording of sound. A MIDI file is a list of notes: which key, when, for how long and how hard. It makes no sound by itself — your DAW or a keyboard plays it with whatever instrument you choose. That's why people convert: once it's MIDI you can change the instrument, fix wrong notes, transpose, slow it down or print it as sheet music.
FAQ
Is this MP3 to MIDI converter free?
Yes. Converting, playing back and downloading the .mid file are free, with no sign-up and no watermark. The conversion runs on your own computer, so it costs us nothing per file.
Is my audio uploaded anywhere?
No. The file is decoded and analysed inside your browser tab. Nothing is sent to a server, and closing the tab clears it.
Which audio formats work?
MP3, WAV, M4A, FLAC, OGG and AAC, plus recordings made with the Record button. Files up to 10 minutes long. If your browser can play it, it can usually convert it.
Can it convert a full song with several instruments?
It will try, and you'll get notes for everything it hears mixed into one track. That is usually cluttered. For clean results, convert a single instrument or a vocal line; if you only have the full song, isolate the part you want first.
How do I use the MIDI file in my DAW?
Drag the downloaded .mid file onto a track in Ableton Live, Logic Pro, FL Studio, GarageBand, Cubase or Reaper. Then pick any instrument for it, fix stray notes in the piano roll and quantize if you need a tight grid.
What do the knobs do?
Note sensitivity decides how faint a sound can be and still count as a note — turn it up if notes are missing, down if you see clutter. Shortest note drops blips shorter than that length. Keep pitch bends writes slides and vibrato into the file. Changes apply instantly after a conversion; you don't need to convert again.