Try to open any preset in Tonebridge before turning on the app's in GarageBand or other app that uses IAA.
[iOS] How to Enable Tonebridge in GarageBand's Inter-App Audio (IAA) on iOS
A
Written by Andy Miller
Updated over a year agoTry to open any preset in Tonebridge before turning on the app's in GarageBand or other app that uses IAA.