Trying some stuff now. The set of samples I have on my computer is cut way back from what it used to be, but there is still a fair amount to play with.
Noisier samples sound more like AMing a drone, but something with a little more variation in the spectrum (dripping water in a cave, wind chimes etc.) is a bit nicer. With the Odd and Even outputs panned in stereo it also gives you some motion. Slowed-down vocal samples with Focus set really high/blurry and some FM and/or sync...
I have the Merlin Bird ID app on my phone with several recordings of local birds, I need to try those out. But I'm supposed to be working from home now, not staring at code while listening to Spectraphon, so I guess I better turn the synth gear off for now