Sound to MIDI Converter Online
Turn any sound — a recording, a melody, a field clip — into editable MIDI notes you can preview, fine-tune, and download in your browser.
- Any recording
- Piano roll preview
- Sheet music export
Click a note to hear it
How it works
Upload your sound
Drop an MP3 or WAV of any recording — a captured melody, an instrument, a sound clip. No account needed to convert and preview.
Preview and fine-tune
Hear the transcription on a piano roll, compare it to the original sound, and adjust detection sensitivity or minimum note length to re-transcribe.
Download MIDI or sheet music
Download the MIDI, edit notes on the roll, or export sheet music as MusicXML/PDF for MuseScore, Sibelius, or printing.
Formats & limits
- Input formats
- Sound
- Output
- MIDI
- File limits
- 50 MB · 10 min
- Price
- Free · no sign-up
Getting the cleanest result from a sound
- Pitched, tonal sounds transcribe well; unpitched noise, percussion, or ambient textures have no clear notes to detect.
- A single clear tone or melody line gives the most accurate MIDI — layered or noisy sounds add stray notes.
- Trim silence and background noise before uploading so detection focuses on the sound you care about.
- Use the built-in editor to clean up the transcription instead of re-recording.
Frequently asked questions
What kinds of sound can I convert to MIDI?
Any pitched audio — a hummed melody, an instrument, a recorded tone. The transcriber detects note pitch and timing, so clearly-pitched sounds work best; pure noise or percussion has no melodic notes to extract.
What formats are supported?
MP3 and WAV uploads up to 50 MB. Cleaner, less noisy recordings give more accurate transcriptions.
Is the sound to MIDI converter free?
Yes. Conversion and browser preview are free with no account required. Signing in saves results to your history and unlocks editing and sheet music export.
How accurate is it?
It uses Spotify's Basic Pitch model. Clean, single-line sounds are nearly perfect; complex or noisy audio will need a few corrections in the editor.