As part of the change, users can play and record from Audiobus-supported apps back into Garageband. That includes iOS apps from Korg, along with Animoog, DM1 - The Drum Machine, Loopy, ThumbJam, and others.
Other changes include a fix for a feedback issue from the headphone jack, along with the option to turn off grid snapping.
Audiobus came onto the scene late last year as a way for music apps to share data and continuity between one another. It's since been adopted in more than 100 apps, and has a public SDK.
In light of the update, Audiobus put its iOS app on sale for 50 percent off, down to $4.99.