Cgs synth

From: bbluthang
To: cgs_synth@yahoogroups.com
Sent: Thursday, June 08, 2006 7:04 PM
Subject: [cgs_synth] Re: Plenty of Analog Switch Matrix and Weighted Random Switch Questions


Hi
its been a while since i built these
>
> Analog Switch Matrix
>
> You use an external source to switch this module, I take it the
Control 0,1,2,3 ins are your gate inputs?

of sorts, these are controlling the analog switches, i labelled
mine 'gate inputs'.

>
> The build for the Analog Switch Matrix will be:
>
> Jacks
> 4 In's
> 4 Control In's
> 1 Com In
> 4 Out's
> 1 Com Out
> 4 Mix in's
> 1 Mix out
>
you may want to put in a switch (mentioned in the article so you can
disconnect the ASM from the WRS)
I built the mixer section as a full blown 6 input DC mixer with
level pots, the ASM outs are wired to the switches on the jacks.
this way i can use it as a stand-alone mixer too.

> Weighted Random Shift
>
> Instructions say for best span of VCO's response RC should be
omitted, is a link set in its place or just leave it blank?
i left mine empty
>
> The Weight CV In's 0, 1, 2, 3 each have 2 pads, what exactly is
this for? Is each pad connected to a jack so 8 in total, and each cv
in is the sum of the 2 jacks??? or am i totally off.
> Also mentioned you could use four pots, how exactly does this work?
>
one input for a jack the other is for a pot, so 4 jacks, 4pots.
In Ken's article, he wrote the input is limited between 0 and 10V
and inverted before being fed to the 4046 VCO. So i wired the pots
with +12V and 0v on the tabs, wiper to input.
i didn't do it but Ken mentions putting a pot in series with RB -
might be worth it?

> Now the Sig in 100k resistor is omitted (do you use a link??).. Do
I still install the signal in jack still, will this allow me to use
the Weighted Random Shift In and just use the outs from the Analog
Switch Matrix or does the Analog Switch Matrix make up for this.
>
if you are wiring the WRS to the ASM, leave out the sig in and the
100K altogether (and the neurotic section), just wire the 0,1,2,3
pads between the two. The C pads are connected via the switch

> Weighted Random Shift build
>
> 1 Clock In Jack
> 4 (8?) Weighted Input Jacks / Pots?
> 4 CV Out Jacks
> 4 CV Out LEDS
> 4 Gate Out Jacks
> 4 Gate Out LEDS

as above, except maybe a pot for the VCO.
These modules are excellent, lots of things to do with them...and
great led display.
hope this gets you going
andrew

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