Hi epfox,
Thanks for your message, sorry to hear about your issues with IAA.
Inter-App Audio comes with its own limitations, that we’ve summarised in the following topic:
Additionally, it seems Apple puts more focus on its newer Audio Unit format, which is supported by a growing list of apps, including Cubasis.
I will try to get in touch with the folks at BiasFX and our friends at IK Multimedia, to check where the problems could be related to.
Please check if you experience the same problems with our latests Cubasis 2.3 release (although it does not contain any IAA related changes).
Thanks,
Lars