MP3 to MIDI

For rather simple, instrumental MP3 files our algorithms produce MIDI files with quite acceptable quality. On the other hand, it will not be able to convert a complex chorus to the MIDI format. But the MIDI format is also not made for a complex chorus, since it was designed for electronic audio sequences. The best you can do is to try the converter and see if the result fits your requirements.

The bad news first: It is not possible with current technology to convert MP3 to MIDI without quality loss due to the fundamental differences between the MP3 and the MIDI file format. The MIDI format can be considered to be a set of commands that produce the sound (think of it as sheet music if you want), while MP3 encodes frequencies. For a perfect conversion from MP3 to MIDI, you would need to back-engineer the partitur of a Beethoven symphony while listening to its performance. This is a problem that still is not fully solved but our AI is getting closer.

The converter detects pitches and timing in the audio and writes them as notes; it does not reproduce the original recording's tone, vocals, or production. When you play the MIDI back, those notes are voiced by whatever instrument your player or DAW uses, so the character will differ — that is normal and expected. Clean, monophonic sources (a solo piano, lead line, or bassline) transcribe most accurately. Dense mixes with several instruments playing at once, heavy reverb, distortion, or vocals are much harder, and overlapping notes may be merged, missed, or mapped to the wrong octave. The output is a starting score you can clean up, not a one-click clone of the track.

Your MP3 is processed in an isolated, per-job sandbox and is not shared, indexed, or used to train our models. Once the MIDI is generated and offered for download, both the uploaded MP3 and the generated file are deleted automatically — typically within minutes, and in any case once the job ends or the session expires. We keep no permanent copy, so re-downloading later means converting again. Because the audio leaves your machine to be analysed, only upload tracks you have the right to process.

Editing is the whole point: the output is a standard MIDI file, so you can open it in any DAW (GarageBand, Logic, FL Studio, Ableton, Reaper) or a notation editor like MuseScore and change notes, instruments, tempo, or key, or print it as sheet music.

Converting MIDI back to audio is a different thing — it just re-synthesises the notes with instrument sounds of your choice and will not rebuild the original vocals, recording, or mix. Anything the MP3 compression already discarded cannot be recovered by converting back, so always keep your source MP3.

It is genuinely free and unlimited: no watermark on the MIDI, no cap on track length, no sign-up or email gate, and no per-day download limit. You convert and download, full stop. The only practical limit is processing time — longer tracks take longer because every second of audio has to be analysed note by note — and you need the rights to whatever you upload.