Hello thanks for your reply.
I think you misunderstood my issue.
Amplitube stoped working with the new IOS update. It worked well previously and it works in Android. Other software of IK multimedia, like Tonex (I used a demo version), works just fine. I've paid for Amplitube and I don't have the will to pay once again for another tool like Tonex.
So my guess is that there should be some change ont the sound settings with IOS 16.3 messing around with other apps having the need to deal with sound drivers.
Regarsds,
Eduardo