hmmm...thanks for that. The only trouble is, if ask to insert a synth into the audio track, the only one available is z3ta+ 2, which does not have the Audio Through option. This is weird, because if I ask to insert an FX, z3ta+ (1), which is what Craig Anderton is talking about. But then of course I can't do what he suggests.
I know that to get z3ta+ as a synth, I need to Manage Plugins and I have managed to get z3ta+ into Synths and have selected my new layout file, but z3ta won't show.
I also only managed once to get audio through z3ta+ as an FX.