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AU to MIDI - Online Audio Converter
Convert AU to MIDI online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to MIDI
Drop AU audio here or click to select
AU
MIDI (MIDI)
About AU to MIDI
Convert AU to MIDI. AU is Sun's simple container, usually holding 8 kHz telephony audio. MIDI packages note events for synths and notation tools. No audio is stored, so playback varies by synth..
Why convert AU to MIDI?
- Tiny files with MIDI note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs MIDI
| Codec | PCM 16-bit | MIDI |
|---|---|---|
| Compression | uncompressed | sequence |
| Sample behavior | Full quality kept | Note events - no audio samples |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | MIDI packages note events for synths and notation tools. |
When not to convert AU to MIDI
- Skip MIDI for recorded sound: it stores note events, not audio, so keep the AU recording.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch MIDI shares.
Limits
Starting point: AU - AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion. No audio is stored, so playback varies by synth. Encode MIDI (MIDI) from AU at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert AU to MIDI?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as MIDI instantly. All processing runs in your browser.
What codec is used for MIDI?
The default codec for MIDI is MIDI. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.