Local monophonic draft
MP3 to MIDI Converter
MP3 to MIDI conversion runs on this device: decode an MP3, trace one clear melody for up to 30 seconds, and open the rough monophonic result in the same editor used for MIDI cleanup.
The MP3 never leaves this device. Only one dominant melody from the first 30 seconds is traced, so chords, drums, and several instruments playing together will create missing or wrong notes. MP3 files up to 20 MB are accepted.
Choose a clear monophonic recording. The first 30 seconds become a rough melody draft in the piano roll.
Start with one clear melody
An MP3 to MIDI converter has to estimate notes from sound; the MP3 does not contain the original notes. Give the detector a dry, exposed lead, bass line, whistle, or single-note instrument with as little backing music and reverb as possible.
The first 30 seconds are analyzed. Trim a representative phrase before opening it when the useful melody begins later, and avoid a full mix where several pitches overlap. Cleaner input produces a draft that needs fewer corrections.
Know what the MIDI draft contains
The result contains estimated note pitches, start times, lengths, and velocity values. It does not preserve the singer, instrument tone, effects, lyrics, stereo image, or the exact sound of the MP3. Preview uses EditMIDI’s browser instrument only.
This tool follows one dominant pitch at a time. It is not a polyphonic MP3 to MIDI transcription service, so chords, drums, dense accompaniment, and several instruments playing together will create missing or incorrect notes.
Correct the result before your DAW
The rough melody opens directly in the piano roll. Remove false notes, move octave mistakes, resize note endings, and listen to short loops. Then quantize only when the performance should follow a strict grid, and adjust velocity when the detected dynamics are too uneven.
Export a standard .mid file after the phrase reads correctly. The MIDI can then be assigned to your own instrument in a DAW, notation program, hardware sequencer, or sampler; EditMIDI does not pretend the first automatic draft is production-ready.
Convert privately in this browser
Audio decoding and pitch detection run on this device, and the MP3 is not uploaded to EditMIDI. The browser must be able to decode the file, and very large or damaged files can fail before analysis with a visible error.
Use only audio you are allowed to convert. Local processing protects the file path, but it does not change copyright, licensing, performer, or publishing rights attached to the recording.
Keep the same file
All EditMIDI tools
Every page runs on the same browser MIDI engine, so you can move between them without uploading or re-importing your file.
- MIDI editor online — edit notes, tracks, and velocity in the browser
- MIDI player online — preview tracks, scrub, and loop without uploading
- Transpose MIDI online — change key without losing tempo or controllers
- Change MIDI BPM online — replace a tempo map with one steady value
- Quantize MIDI online — snap note starts and ends to a musical grid
- MIDI velocity editor — set note dynamics from 1 to 127
- Audio to MIDI — sketch one melody from a local recording
- Suno MIDI cleanup — quantize and fix messy AI exports
- MIDI to MP3 — render a MIDI file to WAV or MP3 in this browser
- Piano roll viewer — see every note, pitch, and length in a .mid file
- WAV to MIDI converter — draft notes from an uncompressed recording
- Vocal to MIDI — turn a hummed or sung line into editable notes
Broader transcription waitlist
The local result is a rough monophonic melody sketch, not a complete-song transcription. Join AI Credits if you want to hear when a broader workflow is good enough to charge for.