OK this is weird. I had tried this before and it didn't work now it does.
That is at step 4 you must have the Geist sampler in the FX bin of the audio track playing. Now it works. There's some hiccup here and I don't know what it is... but it works for the moment..
Which is leading me to
another question (show you out of touch I can be).
These steps...
1) New blank project
2) In the browser add a synth. In the insert soft synth options make sure everything is unticked, so no tracks are created.
3) Create an empty audio track.
So I know I can route the output of the soft synth into the input of that audio track.
Instead though, how can I get that synth into the FX bin of the track? I know there are other methods, but I'm particularly looking at what to do after these steps. Cheers.