WAV to MIDI Converter
Free online · Turn lossless WAV recordings into editable .mid
WAV is lossless, so detection accuracy is noticeably higher than MP3. PureMIDI reads WAV directly, uses AI to detect every note's pitch, timing, and velocity, and exports MIDI you can edit in any DAW — perfect for studio stems and live recording transcription.
Upload audio to generate MIDI
This MVP uses Spotify Basic Pitch on Replicate. Start with 30-60 second single-instrument or melody clips.
Choose an audio file to start
Formats: WAV / AIFF / FLAC. Max 12MB.
How WAV to MIDI works
- 01
Upload WAV
Drop in a 16-bit or 24-bit WAV up to 12MB.
- 02
AI transcribes notes
The model analyzes onsets, pitches, and velocities, including polyphonic material.
- 03
Download MIDI
Open the resulting .mid in Pro Tools, Logic, Cubase, Ableton, or any DAW for further editing.
When WAV to MIDI shines
Studio stem transcription
Drop vocal, bass, or guitar stems straight into MIDI and skip manual transcription.
Live performance capture
Convert live or rehearsal WAV recordings to MIDI for review and re-arrangement.
Sample-flip production
Turn sample loop WAVs into MIDI and remap them to your own sounds.
Classical and academic analysis
Convert high-quality performance WAVs to MIDI for notation, comparison, and study.
Why WAV is more accurate
- WAV is lossless, so the AI sees the full spectrum and produces more accurate MIDI than from MP3.
- Run stem separation first if you have a full mix — single-instrument WAVs convert best.
- Multi-channel surround WAVs should be downmixed to stereo or mono before upload.
- Heavy reverb smears note onsets — reduce wet level before exporting WAV when you can.
Studio WAV to MIDI workflow
If you have stem WAVs from a Pro Tools / Logic / Cubase / Reaper session, this is the recommended pipeline.
- 1. From your DAW, bounce each track to 24-bit / 48 kHz WAV (keep 0.5s of silence on both ends as alignment marker).
- 2. If vocals and lead are already isolated, skip stem separation; otherwise run Demucs or RX through a 4-stem split.
- 3. Upload vocal, drums, bass, and guitar/piano stems individually to PureMIDI to get four MIDI files.
- 4. Create four MIDI tracks back in your DAW and import the four MIDI files at the same alignment point.
- 5. Apply light quantization (10–30% strength) to preserve human feel, then assign the synth instruments from your session.
Why not just use the DAW's built-in audio→MIDI?
Logic Flex Pitch, Ableton Audio→MIDI, and Cubase VariAudio are great for monophonic lines, but barely usable on drum stems. PureMIDI uses Basic Pitch, a polyphonic model tuned for full-band stems and drum loops.
Stem type and best recognition strategy
Different stems benefit from different preprocessing and MIDI channel assignments.
| Stem type | Preprocessing | MIDI channel | Suggested instrument |
|---|---|---|---|
| Lead vocal | Denoise + de-reverb | Channel 1 | Piano or vocal synth |
| Bass | High-pass below 80 Hz | Channel 2 | Sub bass / electric bass |
| Drums | None | Channel 10 (GM drums) | Standard GM drum kit |
| Lead piano / guitar | Compression 2:1 | Channel 3 | Acoustic piano / EP |
| String pad | Compression 4:1 | Channels 4–7 by voice | Strings / synth pad |
| Choir | De-reverb | Split by voice | Choir / voice patch |
WAV to MIDI FAQ
Is WAV more accurate than MP3 for MIDI conversion?+
Usually yes. WAV preserves the full audio signal so the AI extracts pitch and timing more reliably.
Do you support 24-bit WAV?+
Yes. 24-bit / 48kHz studio WAV files work directly.
What's the WAV file size limit?+
Free users get 12MB. Paid plans raise the cap and add batch conversion.
Can I convert multitrack WAV?+
The converter handles one file at a time. Run stem separation to split a mix into vocals, drums, bass, and other parts, then convert each independently.
What if my WAV has heavy reverb?+
Try exporting a drier version. Reverb smears note onsets and lowers detection accuracy.
Does AIFF work too?+
Yes. AIFF is the same family of lossless formats and is supported.
What should I do with the MIDI after export?+
Quantize lightly, tweak velocities, and assign instruments in your DAW for the most musical playback.
Is it good for classical analysis?+
Yes. Convert lossless recordings to MIDI, then import into Sibelius, Dorico, or MuseScore for pitch, rhythm, and expression analysis.
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