imho it is very common that you get zipper noises when
you modulate the delay time of a digital delay.
i would not be surprised if the newer z5000 as well as the
forthcoming doepfer dsp module would still have aliasing
when the delay time is modulated. for me that is part of
the deal with all digital delay processors, at least those
which are affordable.

best wishes

ingo

--- In Doepfer_a100@yahoogroups.com , Richard Scott <richard_scott@...> wrote:
>
> out of interest, which effects parameters do have artifacts Seems to me
> artifacts on pitch shifting could be seen as a feature but artifacts on
> a modulated delay or reverb, erm, could be less good...
>
> Like many people I wasn't convinced by the first generation of the
> Z5000, so I'm waiting to be very sure one of you has got it right before
> scooping up one of these two DSP units!
>
> Richard