Yes, having a 4 devices that each receives on a separate midi channel is straightforward, I agree
My query was about differentiating the USB MIDI data from the other MIDI OUT port data (if possible)
I need to use BOTH the Transmit Ports because I have 3 MIDI devices and only one has a MIDI thru sadly
As I said, I can make do with just 16 MIDI channels with the LIVE Set up, but in the studio I have a number of Multi Timbral keys/module devices where just 16 channels would not be enough (or a real pain to configure)