Supported input
MP3, WAV, FLAC, OGG, and M4A files up to 100 MB. M4A decoding depends on the audio codec supported by your browser.
Private browser tool
MP3 to MIDI
Turn an audio recording into an editable MIDI file. No upload, account, or install.
or
MP3 · WAV · FLAC · OGG · M4A
MP3
audio.mp3
0 MB
Keep this tab open while your device analyzes the recording.
Conversion complete
audio.mid
Could not convert this file
Your audio stays on this device.
Before you convert
Clear scope, no hidden limits
What you get
One standard .mid file with detected notes, timing, velocity, and pitch-bend data ready for a DAW or notation editor.
Where it works best
Use a clear recording with one prominent pitched instrument. Complex mixes can produce missed or extra notes and need manual correction.
Processing limit
This version stops at 5 minutes per file to protect browser memory. Processing speed depends on your device.
How it works
From waveform to editable notes
- Choose or recordYour browser decodes the audio locally.
- Detect notesSpotify Basic Pitch analyzes pitch, timing, velocity, and bends.
- Download MIDIThe detected notes are written to a standard .mid file.
FAQ
Audio to MIDI, without vague promises
How accurate is this MP3 to MIDI converter?
There is no single accuracy number that applies to every recording. Clean solo instruments usually transcribe better than full songs with drums, reverb, distortion, or several overlapping instruments. Review and edit the MIDI in your DAW.
Does the audio leave my device?
No. The model and application code are downloaded to your browser, then the audio is decoded and processed locally. This page does not upload the selected recording.
Can I use it as a WAV to MIDI converter?
Yes. WAV, MP3, FLAC, OGG, and supported M4A files follow the same local audio to MIDI process.
Will it separate every instrument into its own track?
No. This MIDI converter detects pitched notes in the combined recording and writes one MIDI track. It does not perform stem separation or instrument labeling.
Why can a valid M4A file fail?
M4A is a container that can hold different codecs. The file works only when your browser can decode the codec inside it. Converting it to WAV is the most reliable fallback.