MIDI to AU - Online Audio Converter

Convert MIDI to AU online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert MIDI to AU

[+] Drop MIDI audio here or click to select MIDI

Output format

AU (PCM 16-bit)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About MIDI to AU

Convert MIDI to AU. MID files store note events with no audio of their own. AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion..

Why convert MIDI to AU?

Larger files than lossy shares with AU uncompressed quality.
Keep quality where supported.
Private, no upload - runs in your browser.

MIDI vs AU

Codec	MIDI	PCM 16-bit
Compression	sequence	uncompressed
Sample behavior	Note events - no audio samples	Full quality kept
Typical use	MID files store note events with no audio of their own.	AU is Sun's simple container, usually holding 8 kHz telephony audio.

When not to convert MIDI to AU

Skip AU for the smallest share: lossless output stays large, so prefer a lossy target when sending MIDI files.
Keep a master copy: repeated exports stack small losses, so archive MIDI before batch AU shares.

Limits

Starting point: MIDI - MID files store note events with no audio of their own. Rendering needs a soundfont, which sets the final timbre. Headers are minimal; verify sample rate after conversion. Encode AU (PCM 16-bit) from MIDI 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 MIDI to AU?

Drop your MIDI file onto this page, choose quality and codec settings, then click Convert. The result downloads as AU instantly. All processing runs in your browser.

What codec is used for AU?

The default codec for AU is PCM 16-bit. 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.