Multi-stream slice offsets

this is great @james.bradbury! than ks for taking the time.
I somehow missed your post today, while I was working on the ola version and now I find it very interesting to see/follow how you did the parts with fl that I did in normal max…
just in case: iam referring to my mod of your corpus explorer patch over here:

a question about simultaneity of frames in frame lib:
is it correct that as long as grains overlap but didn’t start at the very same time
than sink~ can do it just fine … but if I would like to have 3 simultaneous instances of a grain with different pitches (each one octave apart) I do need poly~ to accomplish it ?