Hmm, a fair bit to take in.

I can't find "divert to dxi/vst synth" and guess you mean the "Re-Route MIDI playback to default Dxi/VSTi Synth". I've checked that again. I still have something playing, though I'm unsure what at present. I have VSTSynthFont64 set as default and I already have "Timbres of Heaven" as the soundfont. All the tracks still say "Microsoft GS etc.", though.

I think I'd unchecked that "Re-Route MIDI playback to default Dxi/VSTi Synth" because I read that I needed that to allow multiple VSTs, but I remember two checkboxes and at present I have only one there, so maybe I'm not where I previously was. Hm, that all sounds a bit existential :-)

Just FYI, the instruments I'm using aren't NI's own, they're Bolder Sounds Roots Upright Bass and Indiginus's Blue Street Brass. That said, from Mario's, I can see where the MIDI channel is set, so I'll play with that tomorrow (it's 11pm, so not now). I'm not sure where RB sets it MIDI channels, but at least I know where to set this end.

RB doesn't presently seem to allow me to set up multiple and I get all the instruments in the one Kontact.

Hmm ... Blue Street Brass is playing ... I'll have to explore the difference! It seems to be playing the bass track .... Ahhh! Got it! Yes!

Thanks guys. That's probably fixed that enough for me to progress.

I just tried a save, close RB, start RB and open and the VSTi stuff has gone again, so there's obviously another hex I need to cast for that. Tomorrow.

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
.