PC getting filtered even when no filters are on

[Darryl]

Hello, 

I'm experiencing the same issue (running the most recent firmware) with PC getting filtered out. I spent about an hour fiddling around with my hardware, trying to figure out why I couldn't get program changes to communicate, when everything else was fine via midi.

It finally occurred to me that it might be the MRCC. 

I was fortunate enough to find this thread and change the MRCC midi control channel (as per Jesse's suggestion) from the default of port 1 to Port 6 channel 16, which immediately resolved the issue. 

Can anyone provide a clear explanation of what the MRCC midi control channel functions as? Is this the midi channel that the MRCC sends data (such as Arp) out from? I wasn't able to arrive at a concise understanding of its function, or why it would be blocking PC, from the manual.

The MRCC uses that port and channel to receive program change to select an MRCC preset.