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).