Using a comb filter as a reverb/echo was not something I have tried before and was quite pleased with the results – though you do have to accept it for what it is and not set about trying to simulate your favourite concert hall:-)

Developed initially with wavetable synth emulations such as the PPG in mind, I also tested the snapshots with my Fender Strat via a Fortin Cali amp sim (Neural DSP). The first six snampshots work quite well fpr guitar provided the tone is not way,way too bright, so some customization of the amp sim eq was required.

I did not attempt any modulation for this patch as the depth parameters are global for a module and are not set per snapshot. This one size fits all feature does not work across varying snapshots!