WAV to MIDI, with the notes checked.
Yes, you can turn a WAV recording into an editable MIDI file. Open the Midilace converter, choose your WAV, select Convert to MIDI, then download the .mid file. Listen to the result in a MIDI editor and correct any note splits or missed pitches. The recording stays in your browser during conversion.
A three-note WAV, run through the live tool
We created a short mono WAV at 22,050 samples per second. It plays A4 (440 Hz), C5 (523.25 Hz), and E5 (659.25 Hz) for 0.8 seconds each, with 0.2 seconds of silence after each tone. Each tone contains a quiet second harmonic, so this is a controlled test signal, not a recorded voice or instrument.
On October 14, 2026, we uploaded that file to the public Midilace page and downloaded its MIDI. The result contained four note events: the three intended pitches, plus one extra short event where the converter split the tail of the first tone.
| Expected pitch | Main event | Extra tail |
|---|---|---|
| A4 | 0.00–0.74 s | 0.74–0.84 s |
| C5 | 1.00–1.85 s | none |
| E5 | 2.01–2.82 s | none |
How to convert your WAV
- Start with a clear passage. One melody or instrument is easier to transcribe than a full, layered song. You can trim a long recording before testing.
- Use the browser tool. Choose the WAV on the Midilace home page and run the conversion. The first run downloads and unpacks the decoder, so it can take longer.
- Open the downloaded MIDI in an editor. Listen with an instrument sound and compare it with the WAV. Look for short duplicate notes, wrong octaves and missing attacks.
- Edit the note events. Merge a split sustained note, delete false notes, or move an onset before using the file in a song.
Why a WAV is not a guaranteed note map
WAV holds recorded sound; MIDI holds note events. Even an uncompressed WAV does not contain a ready-made list of pitches. Midilace estimates that list from the sound. The test above shows that a clean, synthetic single line can still create extra event boundaries. Chords, reverb, noisy rooms and dense mixes give the model more ambiguous information.
Converting MP3 to WAV first cannot restore notes hidden by a busy arrangement. Use the cleanest source you have, and treat the MIDI as a starting point for editing.
Questions about WAV into MIDI
Can I turn a WAV file into MIDI online for free?
Yes. Midilace runs in your browser without an account. Your recording is processed locally; the page does not upload it to a conversion server.
Will the MIDI sound like my WAV?
No. MIDI stores the estimated pitch and timing, not the recorded instrument sound. Your editor supplies a sound when it plays the MIDI.
Will it separate every instrument in a song?
Do not rely on that. This tool produces estimated notes from one audio input; it does not promise separate instrument tracks from a full mix. Test a short passage and inspect the result before committing to a long transcription.