there is a rather rambling and opaque version of this problem statement in a related post:
I am restating it here purely for clarity, and not out of impatience or frustration. I wish to create overlapping grain windows, using phasors inside gen~, inside a poly~. This much is trivial. I would also like to vary the frequency of the phasors without interrupting the ramps, but as soon as I add history/delta/sah, the previously immutable phase-offset is disturbed.
Where the input frequency value is not sampled, the phase offsets are fixed, as desired.