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Quad CV Panner

Quad CV Panner

2003-09-02 by klstay

Hello all,

The MOTM 450 fixed filter bank and 451 companion "individual outs"
modules are on the horizon and I am nosing around for a cascadable
mixer to go with them. Let me explain briefly what I am thinking
about.

1. 4 panning knobs that instead act as "center" when CV in present
2. 4 inverting attenuators for the single CV in
3. channels 2-4 each have 3 way switch for 0-15-30 degrees CV phase
offset from the setting of the switch before it
4. 4 inputs, "left" and "right" outputs, CV input
(maybe 4 "normaled" CV inputs so if only CV at 1 then all 4 channels
use it, CV at 1 and 2 then channel 1 uses it and 2-4 use CV 2 etc.)

By cascadable I mean 2 could be wired behind the panels such that a
single CV in to module 1 would be used for both and if the CV in on
module 2 wasn't patched and the "left" and "right" out on module 2
would have all eight inputs as long as those two outs on module 1
were unpatched.

So for, nobody I've mentioned this to thought much of the idea.

Re: Quad CV Panner

2003-09-02 by John Loffink

If the CV phase offset is a phase offset of a periodic CV input, then
you've put a very difficult design problem in front of this circuit.
There is no simple solution for this if you can't predict the input
waveform. It would be easier to generate the out of phase signals from
the source, such as a VC LFO with multiple outputs.

For an interesting quad panning design, take a look at the following:

http://www.wavemakers-synth.com/847pg1.html

John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com
Show quoted textHide quoted text
>
> The MOTM 450 fixed filter bank and 451 companion "individual outs"
> modules are on the horizon and I am nosing around for a cascadable
> mixer to go with them. Let me explain briefly what I am thinking
> about.
>
> 1. 4 panning knobs that instead act as "center" when CV in present
> 2. 4 inverting attenuators for the single CV in
> 3. channels 2-4 each have 3 way switch for 0-15-30 degrees CV phase
> offset from the setting of the switch before it
> 4. 4 inputs, "left" and "right" outputs, CV input
> (maybe 4 "normaled" CV inputs so if only CV at 1 then all 4 channels
> use it, CV at 1 and 2 then channel 1 uses it and 2-4 use CV 2 etc.)
>
> By cascadable I mean 2 could be wired behind the panels such that a
> single CV in to module 1 would be used for both and if the CV in on
> module 2 wasn't patched and the "left" and "right" out on module 2
> would have all eight inputs as long as those two outs on module 1
> were unpatched.
>
> So for, nobody I've mentioned this to thought much of the idea.
>
>

where is Ken?

2003-09-02 by Aaron Day

Hey Ken-

I've been trying you at every available address but get no response...

Just wondering what is up w/ my order.

Best,

ad

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Re: where is Ken?

2003-09-02 by sasami@hotkey.net.au

>I've been trying you at every available address but get no response...

That is because I forget to check that Yahoo account because you are the
only person who ever uses it.

>Just wondering what is up w/ my order.

Mailed over a month ago via air mail.


If you want to mail me directly via this group, select a message, click
"Reply" then select the "cgs_synth-owner@yahoogroups.com" email address from
the drop-down. Delete the old message from the box, put your own in then
send. At least this way it should get to me without me needing to log into
yahoo (which I forget to do!).


Cheers,

Ken
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: Quad CV Panner

2003-09-02 by klstay

--- In cgs_synth@yahoogroups.com, "John Loffink" <jloffink@a...>
wrote:
Show quoted textHide quoted text
> If the CV phase offset is a phase offset of a periodic CV input,
then
> you've put a very difficult design problem in front of this circuit.
> There is no simple solution for this if you can't predict the input
> waveform. It would be easier to generate the out of phase signals
from
> the source, such as a VC LFO with multiple outputs.
>

This is all very new to me and I only know what I would like to do,
not whether or not it can actually be done ;-) If I understand, the
idea would be to first have a single LFO with 4 outputs. Output 2, 3,
and 4 would each have a 3 way switch for a phase offset of 0-15-30
degrees, or somesuch, from the setting of the switch "before" it. I
guess you could even offer 2 or 3 shapes for each output. (3 rows of
4 would still only be a 2U stooge panel even with the 3 switches.)
That would be a cool module all by itself.

Then the panner would have 4 in, 4 CV in, "left" and "right" out, 4
inverting CV attenuators, and 4 "balance" knobs. But, what would
happen to signals manually panned all the way "left" or "right"? A
rising CV can't make it pan more than full to one side.

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