At your suggestion , I gave this a try.
First I made sure to update my Zynthian
- then added a new synth layer
- Selected Fluidsynth
- Midi Channel 1
- selected Modsynth R1, then used “saw” for testing
It looks like the features I was looking for do exist in this patch.
I was specifically looking for things like Decay and Release, and found them under the “Extended” parameters. I looked in a few other Fluidsynth patches, and noticed the same extended controls were not present. Is that a limitation of Fluidsynth? That seems to be the case with most of the LV2 plugins. Even so, most of them sound really good.
I also did some testing with Helm, and found that it did have good ADSR control already implemented. I’m going to continue with some experiments in Helm, and eventually build a few patches.
Thank you so much for your help and insight!