The Retrigger function is the usual way to start an LFO cycle over again, and it’s in in most of the modulation algorithms, including tremolo. That will apply to the H90, H9, ModFactor, and maybe more that I’m missing (dot9). But for your application, you would still need an external envelope follower (probably a peak detector) to consistently trigger it with audio, and not your foot.
But you did inspire me to try out a workaround in the TremoloPan algorithm. Internally combined modulation using envelope / ASDR with an LFO. Last night, I couldn’t be absolutely certain at what point the LFO Shape was restarting (minimum or maximum value in the waveform). I will follow up with some results, either way.
