I'm having problems getting started using my H4 as an Audio Interface with Garageband on my iMAC. I'm fairly certain that I have the connection and all of the setting configurations correct, and yet I cannot get any sound from the H4 into GB. (I do see the input meters attenuating on the H4, but not in GB.) So I'm wondering if the problem might be that the sampling rates are not matched on the H4 and in GB. If that is the problem, I have not been able to determine how to change the sampling rate in GB. Or maybe it is something else. Any help or insight would be greatly appreciated. Operators standing by!