WAV to MIDI converter
Bounced a stem out of your DAW, recorded a riff into an interface, or found a sample you want to replay on another instrument? Drop the WAV here and get MIDI notes back — analyzed entirely on your machine.
- Runs in your browser
- No upload, no sign-up
- Tempo-aware MIDI
Pick a recording of one instrument or voice for the cleanest result.
Clean up & quantize
Why WAV is the best input for audio-to-MIDI
WAV files are uncompressed, so nothing in the recording has been thrown away to save space. MP3 and AAC encoders remove detail the ear is unlikely to notice, and at low bitrates that includes high harmonics and quiet notes — exactly the clues a transcription model uses to tell a note from its overtones. A clean WAV stem gives the model the most to work with, and the difference is most noticeable on chords, fast passages and quiet background parts.
Sample rate and bit depth don’t need any preparation. Whether your file is 44.1 kHz/16-bit from a CD rip or 96 kHz/32-bit float from a session, your browser decodes it and the converter resamples it internally to the 22,050 Hz mono signal the model expects. Stereo files are mixed to mono first, so hard-panned parts are still picked up.
A quick workflow from your DAW
- Solo the part. Mute everything except the instrument you want as MIDI — a piano, a guitar, a lead synth or a vocal.
- Bounce it dry. Bypass reverb and delay sends if you can. Export a WAV of just the bars you need.
- Convert here. Drop the WAV in. The detected tempo should match your project tempo; if it shows half or double, type your project tempo into the tempo box.
- Tidy and snap. Pick a grid that fits the part — 1/16 for most pop and electronic lines, 1/8 triplets for shuffles — and pull the confidence slider up if you see ghost notes.
- Drag it back. Download the .mid file and drop it on a new instrument track at bar one.
What works well, and what doesn't
| Source | Typical result | Tip |
|---|---|---|
| Solo piano or keys | Very good, chords included | Leave the pitch range open |
| Clean electric or acoustic guitar | Good | Raise Note splitting slightly for strummed parts |
| Bass guitar or synth bass | Good | Set the highest note to about C3 |
| Sung or hummed melody | Good for the main notes | Raise Shortest note to remove scoops |
| Full mix with drums | Busy and hard to use | Separate stems first |
| Drum loops | Not supported | Program drums in the drum machine |
Sampling and re-voicing
A common reason to convert WAV to MIDI is to replay a sample with a different sound rather than chopping the audio — to swap a dusty piano loop for a Rhodes, double a guitar riff with a synth, or check exactly which chord voicing a record uses. Converting gives you the notes; the sound and the rights are separate questions. If you plan to release music built on someone else’s recording, the composition may still need clearing even after you replay it.
Private by design
Studio bounces are often unreleased music, so the converter never transmits your audio. The page and the model are downloaded once; after that, the conversion runs inside a worker thread in your browser. Close the tab and the decoded audio is gone. There is no history, no account and no cloud copy to delete.
Frequently asked questions
Does it support 24-bit and 32-bit float WAV files?
Yes. Anything your browser can decode works, including 24-bit and 32-bit float WAV, at any common sample rate. The audio is converted to the format the model needs internally.
What about AIFF files from Logic or GarageBand?
Safari decodes AIFF natively. In Chrome and Firefox, export a WAV instead, which every DAW can do.
Is there a file size limit?
There is no upload limit because nothing is uploaded, but the converter processes up to ten minutes of audio to keep memory use reasonable. Long WAV files take a moment to decode on phones.
Will the MIDI file keep my project tempo?
The converter writes the tempo it detects. If your project tempo is different — or the detector chose half or double time — type your tempo into the box before downloading and the file and grid are rebuilt to match.
Can I convert several WAV files at once?
Not in this version. Convert them one after another; the model stays loaded, so every file after the first starts straight away.
Why is the converter slower on my phone?
The model runs on your device. Recent laptops use the graphics chip and finish in seconds; older phones may fall back to the processor and take a minute or two for a full song.
Transcriptions are automatic and may contain errors. Converting a recording to MIDI does not grant you rights to the underlying composition. Basic Pitch is © Spotify AB, Apache 2.0; xx808 is not affiliated with Spotify.