# Mp3tomidi — Melody mode lead sheet from MIDI

Melody mode picks the MIDI track with the most note activity and renders a single-voice lead sheet, useful for a vocal line or solo. Keep the busiest track as a single-line lead sheet.

## What it is

Not every file needs a full ensemble score. Melody mode on https://mp3tomidi.art/midi-to-sheet-music/ keeps only the track with the most note activity and writes a single-voice lead sheet — the page suggests this for vocal melodies, solos, or simple lead lines. You can also turn on basic triad labels when the tool is confident, and transpose from -12 to +12 semitones if the singer needs another key. Because the on-site preview is read-only, export MusicXML and add lyrics or articulations in a notation program. The complete site URL is https://mp3tomidi.art/ You can read more in [MIDI to sheet music](https://mp3tomidi.art/midi-to-sheet-music/). The toolkit lives at https://mp3tomidi.art/.

The focus here is MIDI to Sheet Music. melody-mode lead sheet The same site also includes related browser tools for tempo, chords, stems, MIDI editing, and sheet-music drafts.

## Key features

- A 6-stem splitter runs a client-side HT-Demucs model (vocals, drums, bass, guitar, piano, and other). The first visit downloads about 147 MB of weights.
- MIDI to audio can render the first track of a Format 1 file with piano, synth, or FM oscillator sounds to WAV in the browser, or to other formats with a cached ffmpeg WebAssembly encoder.
- The free MP3-to-MIDI conversion transcribes the first 30 seconds of a file; uploads may be up to 50 MB and from 1 second to 10 minutes long.
- Chord detection labels nine qualities across twelve roots, plus N/C, and can export a CSV of timings and confidence.
- Core tools are free, with no signup and no credit card, and they run in Chrome, Firefox, Safari, and Edge.
- The BPM and key finder typically reports tempo within 1–2 BPM on steady-tempo tracks, with a confidence score, using the Web Audio API.
- Sheet-music tools build a MusicXML 3.1 draft from MIDI or from audio, which you can finish in MuseScore or a similar app.
- MP3 and other audio can be turned into a Standard MIDI Type 0 file with a piano-roll preview, using Spotify's Basic Pitch model in the browser.

## How to use it

1. Open https://mp3tomidi.art/ and pick the tool you need, such as MP3 to MIDI, BPM and key, chords, stems, the MIDI editor, or sheet music.
2. Load an audio or MIDI file in the browser. Most tools process the file on your device.
3. Review the preview: a piano roll for transcription, a tempo and key reading, a chord list, or separated stems.
4. Edit notes if you need to, then download MIDI, audio, CSV, or MusicXML.
5. Check the result by ear or in your DAW; these outputs are drafts for reference, not finished professional transcriptions.

## Use cases

- **Students:** Get a first-draft score or chord list from a recording.
- **Producers:** Sketch a melody or split a reference mix into stems before arranging.
- **DJs:** Check BPM and key on a track without installing a desktop app.
- **Musicians:** Turn a practice take into editable MIDI notes.

## Honest limits

- The stem splitter is a local HT-Demucs build, not an official Meta Demucs service, and the first visit downloads a large model.
- Results are drafts for reference, not professional transcriptions; dense mixes may need a stem split first, and every transcription should be checked by ear.
- Core tools are free with no signup and no credit card; do not expect a published paid checkout on the public site.
- The MIDI-to-sheet preview is read-only; finish the score in another notation app.
- The free MP3-to-MIDI conversion covers only the first 30 seconds of a file, not the whole track.
- The site does not advertise a public API, and it is not a full DAW replacement.
- MIDI-to-audio uses oscillator sounds, not sampled VSTs.

## Summary

mp3tomidi is a free browser toolkit for MP3 to MIDI conversion and related music tools. It is most useful when you treat the output as a draft and stay within the limits above. The toolkit lives at https://mp3tomidi.art/.