MIDIConvert
Voice to MIDI guide

Voice to MIDI: use a clean melody and check the result in three minutes

A voice-to-MIDI conversion is easiest to judge when the recording contains one clear melody. Record a short phrase, convert it locally, download the MIDI, and compare the listed notes with what you actually sang.

Short answer: sing or hum one melody for 5-15 seconds with no backing track. A successful test produces a non-empty .mid file that opens, and its note names move in the same up-and-down pattern as your recording.

1. Record the right input

Use a phone or computer microphone and record one voice at a comfortable volume. Leave out drums, chords, a backing track, room music, and heavy reverb. A simple phrase with separated notes is easier to inspect than a full song.

You do not need a polished vocal take. A quiet hum, whistle, or sung scale is useful because you already know which notes you intended. Keep the recording short so the result is easy to compare.

2. Convert it in the browser

  1. Open the MP3 to MIDI tool.
  2. Choose the recorded MP3, WAV, M4A, or another supported audio file.
  3. Leave Detection mode on Melody / solo instrument.
  4. Click Convert to MIDI and wait for the note list.
  5. Download the generated .mid file.

This page processes the selected file in your browser. It is designed for a single dominant pitch, not for separating a complete mix into multiple instruments.

3. Check whether the conversion passed

Use these three checks instead of judging the file by its name:

  1. The file is real: the download is not 0 bytes and your MIDI app can open it.
  2. The shape matches: if your melody rises, falls, and repeats, the listed note names should follow roughly the same pattern.
  3. The mistakes are explainable: one or two wrong notes can happen at a breath or slide; a page full of unrelated notes usually means the input included noise or accompaniment.

When the result is noisy

First make the recording simpler. Remove the backing track, move closer to the microphone, sing one note at a time, and try again. You can also try the tool's Detailed sensitivity setting, but sensitivity cannot separate a voice from a loud instrumental part.

If the same clean phrase repeatedly produces unrelated notes, that is a useful failure result: the recording or browser decoder needs another test. It is not evidence that a full mixed song will transcribe accurately.

What voice to MIDI can and cannot mean

Here, “voice to MIDI” means estimating a monophonic pitch line and writing it as MIDI note events. MIDI stores note, timing, and velocity information; it does not contain the original vocal sound. Open the download in a DAW, notation app, or MIDI editor to inspect or edit it.

Test boundary: this workflow is for a single melody or solo source. It is not a promise of full-song, chord-aware, multi-track transcription.