TuneLab
MP3 to MIDI Converter
Convert any audio file to MIDI — polyphonic note detection with pitch, timing, and velocity. Runs locally, nothing uploaded.
Drop audio file here or click to browse
MP3, WAV, FLAC, OGG, M4A · Up to 10 minutes
Private — processed on your device, never uploaded
First use downloads a small AI model (cached for future visits).
Preparing...
Processing locally
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How to Convert MP3 to MIDI
- 1 Drop an MP3, WAV, or FLAC file (up to 10 min)
- 2 AI detects polyphonic notes, pitch, and velocity
- 3 Preview the piano roll and download the .mid file
Frequently Asked Questions
How does MP3 to MIDI conversion work?
An AI model analyzes the audio spectrogram to detect individual note onsets, pitches, and durations. The result is a standard MIDI file with per-note velocity values you can edit in any DAW.
Does it detect polyphonic content (chords)?
Yes. The model performs polyphonic pitch detection — it can extract multiple simultaneous notes across MIDI channels. Accuracy is highest on isolated instruments; full mixes benefit from stem separation first.
What audio formats are supported?
MP3, WAV, FLAC, OGG, and M4A up to 10 minutes. The converter handles any sample rate — audio is resampled internally before note extraction.
Is my audio uploaded to a server?
No. All processing runs directly on your device using your own GPU or CPU. Your files never leave your machine — not even temporarily.
Can I edit the piano roll before exporting?
The built-in piano roll displays detected notes with pitch and timing. For detailed editing (velocity curves, MIDI channel assignment, quantization), download the .mid file and open it in your DAW or notation software.
How our audio-to-MIDI technology works
