MOTM

I very much like Larry's idea.  In fact, I prefer it to the 130 
because it can apply to any CV.  More flexible.  I have Many VCAs in 
my rig now as it is.

BTW, for panning I use John B's new dual VCA.  With the new MOTM CV 
processing unit, Stooge Designed, that little unit would really kick 
butt.

Mike

--- In motm@yahoogroups.com, "J. Larry Hendry" <jlarryh@i...> wrote:
> OK, I'm gonna step up to the plate on this because it has been 
something I
> have been thinking about for a while.  I'll say what I think a 
good panner
> fader should do.  Then, I will offer a very inexpensive solution 
in my mind
> that can also be a useful utility module when not in use as a 
panner fader:
> 
> What should a panner fader do:
> - Use a single input signal
> - Allow each control to be annenuated for desired effect and 
vaioed input
> out requirements.
> - Allow each control to be biased to contol the amount of signal 
overlap, or
> lack there of in the pan / fade
> - Support different response curves.
> - not add a lot of real estate for specialized VCAs.
> 
> So, while Paul's does plan a MOTM-130, which I will own, I have 
another
> suggestion.  Instead of creating a VCA fader panner, create a 
fader panner
> control voltage module.  This single 1U wide module would work 
with your
> external control signal and not act as a VCA, but instead process 
the
> control signals into the format desireable to control your already 
existing
> quaility VCAs.
> 
> Unless I am overlooking something completely obvious, the 
processing of the
> CV signal is no more than how much gain and how much offset.  And, 
if you
> use a single input, you want an internal inverter for the second CV
> processing.
> 
> So, the module looks like this:  4 knobs and 4 jacks.  It is a CV 
processing
> module.  The 4 controls are offset A, gain A, offset B, gain B. 
I'd probably
> make all 4 controls reversing.  The gain of each is 2.0 so you 
have the
> flexibility to take 5 volt signals to a full 10 volt swing or 
attenuate a 10
> volt signal to 5 V.  The offset is probably +/-5 volts.  2 of the 
4 jacks
> are the 2 CV ouputs that go to our VCAs.  One input jack is 
required. for A
> and B.
> 
> A forth jack could very easily be the B channel input normalled 
from A so
> that for panning and fading, only one input source is required.  
Or, a forth
> jack could be an output that was equal to A+B.  In this case a 3rd 
voltage
> is generated that represents a voltage that could be used "fill in 
the gap"
> between two faded signals or just the opposite.
> 
> The advantage of the B input jack is that this module is now a 
neat little 2
> channel CV processor that can be used anytime you want to bias or 
attenuate
> or apply some gain to a CV in a 2-in, 2-out format.  The advantage 
of the
> A+B output is a unique 3rd CV so that a 3rd VCA can be entered 
into the
> equation in some creative fashion. Real estate does not support 5 
jacks.
> 
> So, that is my 2 cents on the subject.  This would be a simple 
module to
> construct.  Essentially if is a handfull of op amps wired up in 
the correct
> configuration.  You put one of these next to a MOTM-190 and you 
have panning
> fading with maximum control in only 2U.  And, you get to take 
advanage of
> VCAs you already own,
> 
> Larry H (seeing a Stooge panel run for a simple CV DIY processor 
module).