I believe this is solely due to your amp. I have experienced this
with several devices, including RS180 (ASys), A132-1, A132-3, ASol
SY01, and even the RS100 filter, if I just modify the amplitude (or
cutoff frequency) with a gate or a fast envelope. Maybe it's just
because you and I have cheap amplifiers, or maybe it's just inherent
to the voltage levels of modular synths (and their rates of change).
But I think slowing down the envelope time is the only cure.

Anyone with a nice amplifier or monitor have an opinion

Monroe

On Fri, Feb 20, 2009 at 10:34 PM, mirror_saw7778 < haven1@... > wrote:
> I have a pair of 132-3 VCAs and love them except one thing which is
> making me sad. When I control them with a 143-2 ADSR they make a low
> "thump" sound. This sound happens regardless of input signal volume or
> frequency. the sound actually makes nice kicks ;) but makes a mess or
> my delayed arpeggio patches.
>
> The VCAs are in exp mode. the only way I can make it go away is to use
> a slower attack on the ADSR. the only other VCA I have tried is a Asol
> SY02 which does not "thump". the SY02 is not DC coupled AFAIk.
>
> I have the ADSR and the VCA's in separate G6 racks.
>
> any suggestions could this be DC offset due to ground issues I do
> have a furman power conditioner on the AC.
>
>