Just an update on this: I've added envelope delay times.
Link to the code:
https://github.com/Yoshimi/yoshimi/compare/788fc8da56e8418523894b7576e11c43e8c321c9...heuchi:showLFOFrequencyInHz
I'm attaching two little screenshot as well.
Jörn
Attachment:
YoshimiLFOfreq.png
Description: PNG image
Attachment:
YoshimiAdt.png
Description: PNG image