Is it possible to the the above delay in series trick with the patch cable on the H9 as well? I am afraid to damage something so I want to be sure.
Yes, there's no danger of damaging your H9 by doing this. I just had this hooked up myself, and I can confirm it's pretty fun.
Is there any other algo on the H9 that has delay in series? I want to run delay A into delay B. is that possible with one of the delay algos? or maybe a pitch algo?