Well, the title says it all.
The reason for my question is because I sometime ago I tried to use the device output (USB A) on the iOne directly into the Apple camera adapter. When doing so I cannot use the instrument (line) input. The reason for wanting to do this is so that I can charge the iOne using the USB B connection and At the same time charge the iPad mini via the lightning port on the Apple camera adapter.
Merely curoius if anyone has tried this and if it worked.