Oregonian Haruspex wrote in
:

To my ear the
zipper noise as you change envelopes and whatnot is quite
synth-dependent.

True, some are ok with it. Kurzweil for example. There's usually a payoff
though, a sluggishness in response that can be treacly or even intolerable if
wanting the kind of response to glide a violinist wants. Mine's not perfect
either, but I got a better compromise than anything I'd heard in anything I'd
owned since 1983 when I first got one. (DX7). I just tried to eliminate
every vice that ever irked me in an instrument, note stealing in voice
allocation, for example... it has to happen, but making it sound less
conspicuous turned out to be a demanding puzzle to solve efficiently.
Likewise the non-linear slopes in just about everything, that is at the core
of why a DX7 is inherently 'natural' when so many others are not. That is fun
though, very interesting discoveries there..