Doepfer

hello ernst,

the feedback-behaviour is caused by the bbd chip.
small bbd's with only a few stages (for example 128 or 256)
go into self-oscillation more smoothly, a bit like a vcf.
bbd's with more stages (for example more than 2048) go into
self-oscillation a lot faster, when a certain feedback
level is reached. that makes the feedback adjustment more
touchy on long bbd's. the a188/2 may have an output tap
for 396 stages, but after all it uses a bbd chip with
3328 stages, thats why the feedback behaviour is more harsh.

if you want better control of the feedback you could insert a
linear vca (a130) in the feedback path of the a188/2.
now you just need a voltage for the vca which is small enough
for your adjustment.

best wishes

ingo



--- In Doepfer_a100@yahoogroups.com, "ErnstKarel" <ekarel@...> wrote:
>
> Okay, so I'm trying to do Karplus-Strong synthesis now using a 188-
2.  The main problem 
> I'm having is in getting the right amount of feedback without 
getting overwhelming feedback.  
> There is only the very very tiniest amount of distance on the knob 
between the two, meaning 
> one has to make a very very very precise adjustment, barely barely 
turning the knob at all, to 
> try to get the right amount of feedback.  This is extremely 
difficult, and actually in a live 
> setting is impossible to get without going "too far".  
> 
> Has anyone else done KS synthesis using a 188-2?  Am I missing 
something?
> 
> I know that for "realistic" KS-synthesis I could filter the 
feedback, but I'm not necessarily 
> interested in realism....
> 
> thanks,
> Ernst
>