Originally Posted By Diki
The area to look into is the MIDI Sets.

Thanks for all your helpful info!

Since there are only 8 recallable MIDI configs, I don't think the inability to specify MSB/LSB for a program change would necessarily be much of an issue. If I wanted, for example, external sounds to be associated with MIDI Sets 2 through 8, I could put the 7 desired sounds on 7 different channels on the iPad side, so merely having a MIDI Set transmit on a different channel would call up the desired sound, without having to send any Program Change at all!

I think there are also AUv3 hosting apps which, themselves, could respond to Program Changes of your choice (i.e. staying within 1-128 with no MSB/LSB needed), and that app would in turn invoke the desired patch from one of the hosted apps. I'm thinking about Keystage, Camelot Pro, AUM... I think one or more of these would probably be able to do that.

Sorry to hear of your health issues. :-(