MelodyTrace

MIDI Converter — Convert MP3, WAV & MIDI Online

One tool for every direction — turn MP3 or WAV recordings into editable MIDI, or render a MIDI file back into shareable MP3 audio, all in your browser.

AudioMIDI
  • MP3 / WAV → MIDI
  • MIDI → MP3
  • SoundFont rendering
Start converting

Conversion studio

Choose a format and add your track

Drop your track here or browse

MP3 or WAV · processed securely

Maximum file size: 50 MB

Result

Waiting

Your result shows up here

Pick a format and add a file on the left. The transcription lands here as a piano roll you can play, edit, and download.

  1. 01

    Add a file

    Drop in MP3, WAV, or MIDI

  2. 02

    Convert

    Pitch and timing detected for you

  3. 03

    Edit & export

    Fix notes, export MIDI or sheet music

How it works

01

Choose your conversion

Pick a direction in the converter: audio to MIDI (transcribe MP3/WAV into notes), MIDI to MP3 (render notes to audio), or MP3 to MIDI with a SoundFont.

02

Upload and preview

Drop your file. For audio to MIDI, preview the transcription on an interactive piano roll; for MIDI to MP3, hear the SoundFont render — before you download.

03

Fine-tune and download

Adjust detection or swap the SoundFont, edit notes on the roll, then download MIDI, MP3, or export sheet music as MusicXML/PDF.

Formats & limits

Input formats
Audio
Output
MIDI
File limits
50 MB · 10 min
Price
Free · no sign-up

Choosing the right conversion

  • Going from a recording to notes? Use audio to MIDI — it works best on clean, monophonic melodies.
  • Have a MIDI file you want to hear as audio? Use MIDI to MP3 and upload a matching SoundFont for a natural sound.
  • Want to keep the notes but change the instrument? Transcribe with a SoundFont, then re-render with a different .sf2.
  • Every conversion previews in the browser first, so you can check the result before committing to a download.

Frequently asked questions

What can this MIDI converter do?

It converts in both directions: audio (MP3/WAV) to MIDI by transcribing the notes, and MIDI to MP3 by rendering the notes through a SoundFont. You can also export transcriptions as sheet music.

Which file formats are supported?

Input: MP3, WAV, and MIDI (.mid). Output: MIDI, MP3, and sheet music as MusicXML or PDF. SoundFonts in .sf2 format can be uploaded to control the rendered instrument sound.

Is the MIDI converter free?

Yes. Conversion, browser preview, and download are free with no account required. Signing in saves results to your history and unlocks editing and sheet music export.

Do I need to install anything?

No. The converter runs entirely in your browser — no downloads, plugins, or DAW required.

Related reading

How to prepare a recording for audio-to-MIDIImprove editability by preparing clear melodies, controlled accompaniment, and lower-noise recordings.Give MIDI a new voice with SoundFontUnderstand SF2, SF3, and MIDI rendering, then audition notes quickly as MP3.

More converters

Open the full workbenchRead the audio-to-MIDI guide