Doepfer

No, I guess it wouldn't need a vactrol to make the low-pass gate. But it 
would need to be a low pass gate, meaning that it would need to 
exponentially reduce the higher frequencies over time so you would get a 
lot of high frequency formants at the start of the note and it would 
dampen down to the resonant frequency at the end of the note.

Perhaps a similar trick could be done with an envelope generator, 
however, controlling either the cutoff frequency or the resonance or 
both of a low pass filter. Might sound similar but probably not the 
same. I think I've seen some low pass gate designs that don't use a 
vactrol to control the shape of the high frequency decay, although as 
far as components go, a vactrol (an optocoupler combining an LED and a 
photoresistor...it's the slow response time of the photoresistor that 
gives the characteristic slew of the vactrol) is pretty darn cheap. But 
that's DIY talk again...

The Make Noise low pass gate looks pretty good for what it is. We just 
gotta get that dude doing the demo to get rid of the vocal pitch 
shifter. Does he think he's James Earl Jones as Darth Vader or 
something? ;-)

D.

madrayken wrote:
> --- In Doepfer_a100@yahoogroups.com, "Ken" <kenneth_harte@...> wrote:
>> just saw this...
>>
>> http://www.youtube.com/watch?v=UJwTtrl6rus
>>
>> bongo with the new module from makenoise.
>>
> 
> Indeed - this vid is what prompted my original question. By the sounds 
> of it, you don't *need* a vactrol in order to produce the bongo sound.


-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 145:
"Slow preparation, fast execution"