14 DAY TRIAL // After updating the iOS installment of GarageBand with Audiobus support, Apple has released a series of knowledge base articles addressing various issues, including pops, clicks and dropouts, as well as distorted audio, more recently.
KB article TS4545 on Apple’s Support site states that, “When using Audiobus to record in GarageBand from an Audiobus-enabled application, in some situations the audio may become distorted after connecting a multichannel audio interface.”
Apple’s resolution is simpler than you might imagine: simply update any Audiobus-enabled apps you may be using with GarageBand.
The Cupertino giant also encourages affected customers to check with the manufacturer of the hardware / software for more information. A bunch of related topics are detailed in the support articles listed below.
GarageBand for iOS 1.4 or later: May have pops, clicks, or dropouts with Audiobus GarageBand for iOS: No audio when monitoring external device GarageBand for iOS: No audio input with Apogee Jam GarageBand for iOS: What's new in GarageBand for iOS 1.0.1 GarageBand for iOS 1.2: Punch in/out unavailable during a jam session