I'd be interested to hear what are the exact benefits of that update.
The easiest way to hear the filter effect is:
filter = 12
resonance = 96 ish
keytracking = 64
unison-mode = all voices (no detuning).
osc 1+2 fine = 0
slop = 0
So the tuning should be rock solid. Turn on unison mode. Play a middle C, and then the highest note on the keyboard a few times. The high note should have a chorus effect applied, but not middle C.
My other conjecture about 'less phasing' was just that ... I did not really A+B the two firmwares because I'm weary of trying my luck (sorry to hear about the above poster
) . However over the last year or so I've noticed some very strange variance between the voices (I've been on the beta OS for some time). Sometimes voices 3+4 just don't want to play (hard reset always fixes that). Other times it is clear that the pulse-width is changing between voices (and there is no sequencer applied), sometimes the pitch, etc. I know some variance between voices is part of the analogue charm, and in some cases it is warranted, but I do wonder whether this update introduces some variance in tuning between the voices that creates some phasing / loss of bass even when the synth is tuned to be rock steady. My hearing that the patches sounded somehow 'fuller' could have been emotional after realizing I fixed my filter tuning issue, which was real.