hello a1k,

well, just think about the standard voice patch and then
replace the vco with a noise source.

a117 or a118 -> vcf -> vca

use the pitch cv to control the vcf cutoff and
use a short envelope to open the vca.
different notes on the keyboard will lead to
different timbres.
ideally the vcf is a multimode filter,
so you can experiment with the filter types.
highpass filtering will give you hihats and so on ...

this is of course the most basic patch for noise percussion,
but it's a good starting point for developing own patches.
example, use another vca to control the envelope depth
with the keyboard velocity. add other shapers to the signal
chain. use different vcf's. take a vco, modulate it's pitch
with an envelope and use the resulting vco squarewave output
as clock signal for the a117.

best wishes

ingo

--- In Doepfer_a100@yahoogroups.com , "analog1k" <analog1k@...> wrote:
>
> Hi, has anyone got any white noise percussion type
> modular patches, i have both an A-117 & 118 in my
> system, anything would be much appreciated, thx.
>
> Regards
> A1k
>