MOTM

Try this:

a) set RES to 0 on the panel
b) plug out into mult
c) plug 1 mult out into '110 X IN
d) set X on AC, Y on DC
e) use ADSR OUT + into Y IN
f) output of RM into one of the AUDIO INs of the '420

so, we are applying the filter output back into it's input, trrough a 'VCA'.
This is essentially how all
VC Q is done.

Paul S.

on Monday, August 27, 2001 3:05 PM Paul Schreiber <synth1@...>
wrote:


> Try this:
>
> a) set RES to 0 on the panel
> b) plug out into mult
> c) plug 1 mult out into '110 X IN
> d) set X on AC, Y on DC
> e) use ADSR OUT + into Y IN
> f) output of RM into one of the AUDIO INs of the '420
>
> so, we are applying the filter output back into it's input, trrough a
'VCA'.
> This is essentially how all
> VC Q is done.
>
> Paul S.

This makes sense - thanks Paul.  In the earlygoing, I had tried simple
feedback loops with each of the filters (as well as other modules) to help
me learn about their sonic characteristics.  I had noticed that this
feedback was very similar to the res control.  (Believe me, I'm still
learning!)  I've also experimented with chaining a 420 to a 440 and feeding
back the 440 output to a 420 input - different and cool.

I haven't tried it yet, but I bet applying the technique you've described
above with a 410 would produce *interesting* results.

So, I'm thinking a "filter companion module" to add this VC res
functionality (and maybe provide access to the resonance loop) would be
useful, eh?  Or maybe a daughter board to hold the VCA and add a jack for
res-in (and possibly res-out).

George

OK Mr. Smarty-Pants, so if I want access to the feedback path for 
resonance, this is how I would do it.  Correct?

Mike


--- In motm@y..., "Paul Schreiber" <synth1@a...> wrote:
> Try this:
> 
> a) set RES to 0 on the panel
> b) plug out into mult
> c) plug 1 mult out into '110 X IN
> d) set X on AC, Y on DC
> e) use ADSR OUT + into Y IN
> f) output of RM into one of the AUDIO INs of the '420
> 
> so, we are applying the filter output back into it's input, 
trrough a 'VCA'.

> This is essentially how all
> VC Q is done.
> 
> Paul S.

synth1@... writes:

>>
a) set RES to 0 on the panel
b) plug out into mult
c) plug 1 mult out into '110 X IN
d) set X on AC, Y on DC
e) use ADSR OUT + into Y IN
f) output of RM into one of the AUDIO INs of the '420
<<

In the past the only way I was able to get decent sounding filter resonance 
by feeding the output back into the input was to invert the signal.  I used 
the MOTM mixer for that.  Unless the RM inverts the signal it probably won't 
work properly.

-Elhardt