This is such a basic thing that I must have just missed it in the documentation. Playing multiple instruments from a single source is something MIDI has been able to do for 37 years, so there must be nothing to stacking 'em up inside Cakewalk.
I have a recorded-in-real time MIDI track that I want use to drive 2 different soft synths.
My MIDI track seems to allow only a single output, and I can't see any way to "stack" or daisy chain soft synths. Some equivalent to the hardware synth "t
OK, I now know it was ME!
I read the instructions at https://www.codefn42.com/faq_routing_cakewalk.html and I was missing the MIDI echo being turned on. The selected MIDI track has an AUTO MIDI echo enabled when it is selected and is turned off, when another track is selected, so that explains what I was seeing with only one working at any one time.