CGS51 weighted random switch + cgs55 analog switch matrix

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astroschnautzer
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CGS51 weighted random switch + cgs55 analog switch matrix

Post by astroschnautzer » Mon Oct 12, 2009 10:25 am

I have been reading the cgs descriptions and cgs yahoo group and checking out the bridechamber panel and I think I finally start to understand what these modules do... Just one thing still bothers me: What are the input knobs on the bridechamber panel for, are they for the separate mixer or attenuators for the inputs or what?
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astroschnautzer
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Post by astroschnautzer » Mon Oct 12, 2009 3:54 pm

Got the answer from scott@bridechamber and it is indeed just the attenuators for the switchmatrix inputs.

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the bad producer
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Post by the bad producer » Sun Nov 13, 2011 10:41 am

Just about to build my weighted random switch (on its own) just wondering if anyone else had done some spiffing panels to look at for ideas, not sure how to implement it yet...

(just thought I'd bump this topic rather than create a new one!)

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astroschnautzer
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Post by astroschnautzer » Sun Nov 13, 2011 12:09 pm

zthee had some nice serge style layouts for this, maybe it can be found with the search function.... havent built my yet :)

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Post by iopop » Sun Nov 13, 2011 12:19 pm

Thanks for bumping this one. Been trying to sketch down a Buchla styled version of this combination. No luck so far though and the Bridechamber panel had me all puzzled.

EDIT: here's one example I found via search,
Image

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the bad producer
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Post by the bad producer » Sun Nov 13, 2011 12:35 pm

cool thanks, I've just had a look and couldn't see anything!

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Post by andrewF » Sun Nov 13, 2011 6:41 pm

been a while, couldn't find the fpd file, so a shiny pic will have to do. this one is mated with the ASM so doesn't have the routing section
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the bad producer
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Post by the bad producer » Sun Nov 13, 2011 8:15 pm

nice one andrew, thanks... errr, is that saint john being boiled alive? or someone having a bath?

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Post by andrewF » Sun Nov 13, 2011 8:29 pm

boiled
old style detox? From memory; the king is being re-assembled after being beheaded and chopped to bits.
its from Splendor Solis

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Post by the bad producer » Mon Nov 14, 2011 8:55 am

ahh, I see, thought it was a version of this...

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the bad producer
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Post by the bad producer » Mon Dec 19, 2011 9:02 pm

finally figured out a design, basically similar to everyone else's!

see if I can get it working this weekend...

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limpmeat
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Post by limpmeat » Mon Dec 19, 2011 10:02 pm

Can anyone explain what these modules do? Especially when linked together like on the CGS page...

and dumb it down as much as possible please :)

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Post by floris » Tue Oct 07, 2014 9:33 am

bump for the limpmeat question

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Post by widdly » Tue Oct 07, 2014 7:47 pm

When it receives a clock, the switch input will be switched to one of the switch outputs. This is a digital switch and will only switch gates or trigger signals. If you combine the circuit with an Analog Switch like the CGS55 you can switch analog or digital signals.

The probability of a certain input being selected is controlled by it's CV input.

The gate for a selected input goes high when it is selected.

The CV outputs are the distributed probability of the CV inputs. The sum of all the CV outputs stays constant. You can imagine it as

CV out 1 = CV in 1 / (CV in 1 + CV in 2 + CV in 3 + CV in 4)
CV out 2 = CV in 2 / (CV in 1 + CV in 2 + CV in 3 + CV in 4)
etc...
Therefore the CV outputs for say channel 1 is effected by the settings of the other CV inputs. If CV IN 1 is higher than all the other CV inputs then CV out 1 should be higher, but increasing say CV in 2 should reduce CV out 1 and increase CV out 2.

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Post by floris » Wed Oct 08, 2014 11:16 am

thanks!

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Post by phisynth » Mon Apr 18, 2016 2:47 pm

Bumping this old thread because I'm currently building these modules (linked) and I was wondering if someone could elaborate on how to wire the jack/pot combo on the WRS part.

The docs are a bit unclear about it...

Are the knobs wired as simple input attenuators or are they supposed to send fixed voltages in parallel to these CV inputs ? (as there are 4 x 2 pairs of inputs).

In this case, what would be the best way to wire these pots ? (considering the summed voltage is to be kept under a certain amount I suppose)

Here's my panel for it (the labelling needs some more work)

Image

Thanks !

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Post by Exhale » Fri Nov 08, 2019 6:24 am

What's the advantage of having WRS and ASM wired separately ?
Or better to combine them ?

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the bad producer
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Post by the bad producer » Fri Nov 08, 2019 9:54 am

The pots on my WRS are wired between +V and GND - ie fixed voltages to affect the weighting.

Nice panel!

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Re:

Post by tardishead » Wed Jan 22, 2020 4:40 pm

the bad producer wrote:
Fri Nov 08, 2019 9:54 am
The pots on my WRS are wired between +V and GND - ie fixed voltages to affect the weighting.
Sorry to bump old thread AGAIN
I'm having difficulty with my WRS which is strange because I can normally figure out the CGS builds
I can get it to work but it locks up on one stage and won't continue. Only certain ratios of the control weighting seem to work
I have to power down and then it normally restarts but not on all settings - seems to have a very limited window.
Does anyone else have a similar experience?
With CGS builds in the past I have discovered that not all 4000 logic chips are created equal. Some have weird quirks and sometimes even Ken specifies use HEP or CD types.
And I also could only get it to work with positive going +5v pulses from my VCS. All other clocks don't seem to work. Definitely 5v bipolar ones.
Anybody care to comment?

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Re: CGS51 weighted random switch + cgs55 analog switch matrix

Post by the bad producer » Thu Jan 23, 2020 2:58 am

I had one WRS that didn’t work for years and I was tearing my head out whenever I looked at it, I think in the end it was the logic chips as you suggest, I basically rebuilt it to no avail and iirc removed the chips to use elsewhere and then replaced them and it worked...

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Re: CGS51 weighted random switch + cgs55 analog switch matrix

Post by tardishead » Thu Jan 23, 2020 5:37 am

the bad producer wrote:
Thu Jan 23, 2020 2:58 am
I had one WRS that didn’t work for years and I was tearing my head out whenever I looked at it, I think in the end it was the logic chips as you suggest, I basically rebuilt it to no avail and iirc removed the chips to use elsewhere and then replaced them and it worked...
Yeh it feels better that I am not the only one!
Can you confirm that only positive pulse clocks it?

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Re: CGS51 weighted random switch + cgs55 analog switch matrix

Post by the bad producer » Thu Jan 23, 2020 10:27 am

I can clock mine from:

PCO sine
PCO triangle
PCO saw
DTG out
DTG end out

is that helpful? Oh should add, I don't have Switch Matrix attached, just the WR

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Re: CGS51 weighted random switch + cgs55 analog switch matrix

Post by tardishead » Sun Jan 26, 2020 4:31 pm

the bad producer wrote:
Thu Jan 23, 2020 10:27 am
I can clock mine from:
PCO sine
PCO triangle
PCO saw
DTG out
DTG end out
Thanks.
I had a fiddle with some other logic chips and it seems to be working a bit better. It still locks up on some settings.
And its a little bit glitchy - sometimes stages that are not selected let through the tiniest spike of input. Is that consistent with your module too?
Oh yeh and now I can get it to clock from pretty much anything - so weird logic chips do my head in!
On further experimentation it appears if I set any of the 4 voltages above a certain voltage threshold the whole circuit will lock. It seems I will have to add a limiting resistor in series with the pots to stop this from happening

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Re: CGS51 weighted random switch + cgs55 analog switch matrix

Post by the bad producer » Mon Jan 27, 2020 2:34 pm

I'll do some more testing but I haven't experienced it 'locking' - AFAIK anyway :hihi:

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