Audiobus: Use your music apps together.

What is Audiobus?Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.

Download on the App Store

Audiobus is the app that makes the rest of your setup better.

Audulus Crackling Problem FIXED! Update now to 3.5.2

Many users have experienced an issue with crackling audio and Audulus. It was an odd problem because it seemed like some patches would run faster on older iPads. The problem was tracked down to a stray bit of code that should have been removed. The result was it dragged down graphics performance, and audio suffered as a result.

The good news is that this bug has been FIXED and the update 3.5.2 is available now.

Thank you to everyone who reported and helped isolate the problem.

This update will result in significant CPU% savings - in some cases up to 50%! This means you can make bigger and badder patches on any device you have.

If you haven't already joined, the new Audulus forum is up and running and has a lot of great new stuff going on.

Hope to see you there!

Let me know if you have any questions in the comments below. Thanks!


  • This is mean Nebuchatnezaar patch, now at about 70% CPU instead of being plain unusable - great!

    Thanks you very, very much :) :) :)

    Scrolling around or making a screenshot still causes trouble, but this is for Apple to fix.

    @Audulus_Mark Maybe you can report this to Apple? ;)

  • @Audulus_Mark Fantastic work! Takes some bite out of the beasts for sure!

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