Skip to main content

Audio tool

Convert MIDI Files to AU on Your Device

Make a AU copy of MIDI in your browser for legacy workstation exchange. Processing takes place locally, so the original MIDI never leaves your device.

  • Runs in your browser
  • Private processing
  • No install
  • Files stay on device

Route MIDI → AU

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

Ready
0%

Quick use cases

  • Adapt music-event exchange to a workflow built for legacy workstation exchange
  • Supply AU when an editor, player, or delivery form will not accept MIDI
  • Create a AU copy from MIDI for Unix workstations and older audio software

Workflow

  1. Choose a MIDI file from your device
  2. Confirm the planned AU filename
  3. Start the AU conversion
  4. Download AU and test it in the destination app

Processing notes

  • Local conversion competes with other open apps for processor time during this MIDI-to-AU job.
  • Long MIDI files consume more memory and take longer to decode.
  • Compare the AU duration with the source before publishing.

Compatibility notes

  • AU serves Unix workstations and older audio software, whereas MIDI commonly serves DAWs, instruments, and notation tools.
  • For MIDI-to-AU delivery, plan for limited modern consumer support.
  • After leaving MIDI, the receiving app must support the streams encoded inside AU, not only its extension.

Troubleshooting

  • MIDI to AU taking too long? Free local memory and keep the conversion tab in the foreground.
  • AU converted from MIDI not opening? Test a compatible player and inspect the output streams.
  • If AU is rejected, compare its codec and stream settings with the destination specification.

MIDI to AU converter FAQ

When does MIDI to AU conversion make sense?

It is useful when MIDI media created for music-event exchange must enter a AU system designed for legacy workstation exchange.

Where is the MIDI source processed?

The browser prepares AU from MIDI on this device instead of sending the source to a remote conversion server.

How can I approve AU converted from MIDI?

Test the AU file in the receiving app and compare duration, channels and loudness with the MIDI source.

Related tools

Edit audio & extract from video