My iOS app using CoreMIDI is able to receive MIDI messages from various keyboards, but I have just received a note from a customer notifying me that my app does not appear to receive MIDI messages from his Casio CT-S1 keyboard. I am stymied on how to diagnose and fix this issue. Clearly there must be something amiss in my CoreMIDI integration. I thought perhaps someone else might have encountered a similar odd situation such as this.
If it helps, here is my CoreMIDI integration code. Thanks!
Regards,
Brad