Hi,
I’ve tried all the options available in the MIDI in /out fields - DM,Virtual, Network, etc on various MIDI channels including omni. Also done the same with the options back in on the audio channel - nothing doing.
I tried sending the same stream of MIDI notes from the CB track into Sunrizer and at the same time recording the resulting audio back into CB - perfect! So I think CB is off the hook.
As for triggering DM with something else,I’ll try it tonight. Got a choice of Beatmaker, Little MIDI machine, and StepPolyArp. I’ll soon know, but I’m suspecting that DM’s MIDI credentials are not what they appear. 
Thanks for your replies.
M t D