Is WAV better than MP3 for converting to MIDI?

Usually a little. A WAV keeps the quiet notes and sharp note starts that MP3 compression softens, so fast passages and soft notes come through more often. The difference is smaller than the difference between a dry single instrument and a full mix: a clean MP3 of one instrument converts better than a WAV of a finished song.

Is my WAV file uploaded anywhere?

No. The file is read from your disk and converted by a model that runs in the page. Nothing is sent to a server, so an unreleased bounce stays on your machine.

Can I convert a whole song WAV to MIDI?

You can load a WAV of up to 3 minutes and 30 MB, and convert up to 60 seconds of it per run. A finished mix gives a rough sketch with missing inner parts — no audio-to-MIDI tool reliably splits a song into instruments. Convert a single stem if you have one.

WAV to MIDI Converter

Drop a WAV bounce and get an editable MIDI draft. It is converted in your browser, and the download is free.

Make room for your next melody

Drop one audio file, or several at once

Works best on a clear single instrument or one melody line. Pick a 15–60 second section for the fastest, most accurate draft.

.mp3 · .wav · .ogg · .flac · .m4a · .aac
up to 30.0 MB
up to 3 minutes

A full song is fine: you can convert its first 3 minutes. For a later section, or a WAV over 30.0 MB, export just that part, or save it as an MP3.

Converted in your browser — your audio is never uploaded, and the export is free.

A folder of clips? Select them all at once, or open the batch converter.

No file handy? Try one of ours:

Have an MP3, FLAC or M4A instead? The same audio to MIDI converter reads those too.

Before and after

A WAV in, a MIDI draft out

Clear single-note piano melody

One note at a time, moderate tempo, no effects. This is the material audio-to-MIDI handles best.

What you get: Expect nearly every note start and pitch to come through. You may still want to trim note ends before dropping it into a project.

Synthesised piano-like tone, 96 BPM, 22 seconds, mono WAV at 44.1 kHz, no reverb or compression.

More examples, including one that converts badly

Original: piano melody

Runs in the converter above. Flip Original / MIDI while it plays to hear the difference.

Formats and limits

How much WAV fits

Files can be up to 30 MB and 3 minutes, and each run converts up to 60 seconds. A WAV hits the size limit before the length limit unless it is mono. The model mixes to mono anyway, so a mono bounce loses nothing.

WAV bounce	Fits in 30 MB
16-bit, 44.1 kHz, stereo	just under 3 minutes
24-bit, 48 kHz, stereo	about 1 minute 50 seconds
16-bit, 44.1 kHz, mono	the full 3 minutes

Also accepted: MP3, FLAC, M4A, AAC and OGG. The output is a standard .mid with pitch, start, length and velocity on one track and the tempo in the header, so it opens in any DAW.

When a WAV does not convert well

The WAV is over 30 MB: High sample rates and stereo fill the limit fast. Bounce only the section you need, bounce it in mono, or save it as an MP3 — three minutes of MP3 is about 7 MB.
"Could not decode" the file: Most WAVs are plain PCM and open in every browser. Some recorders and samplers write compressed WAVs (ADPCM, µ-law) that a browser cannot read. Re-export as 16- or 24-bit PCM WAV from your DAW or an audio editor.
Far too many notes: Reverb tails, master-bus processing and several instruments at once all turn into extra notes. Bounce the track dry, one instrument, with effects off. More in why audio to MIDI gives too many notes.
Notes drift off the grid in your DAW: The .mid carries the tempo shown next to the piano roll, estimated from the notes. Set the real tempo before you export, or see fixing audio to MIDI tempo.

FAQ