Gated Comparator demo

[fluxmonkey]

an example using the Gated Comparator as the main control source:

http://thursday-club.net/sound/fluxmonk_may08.mp3

GC driving 3 blacet oscillators (x-modulating each other) and triggering 3 ADSRs driving 2 VCFs and 1 LPG. Probably some wogglebug action in there as well. As the piece progresses, main manipulation was to open up the comparator level, and change the amount of comparator modulation going to the oscillators; then some fairly wide swings thru the various osc. freq. knobs... also some gradually opening up of the filters.

bbob
www.fluxmonkey.com

[Coriolis]

Thanks Mister! I have one of those in the backlog, and have never heard an example before, so this is great.



C

[neandrewthal]

Great! Mine's right up to the plate, so this will give me the kick I need to get started on ir.

[Funky40]

thanks bbob, i had no Idea what this moule does.

[funkyfarm]

Is it possible to have this module to behave like a standard sequential stepper/sequencer ?
with only one stage active.

What CV to put in ?


I didn't remember about this either :

[funkyfarm]

[andrewF]

[neandrewthal]

[andrewF]

I think it would work, but you would need to reduce the voltage into the collectors of the transistors. As more than one transistor can be on at once, the summed voltage into the opamp can easily get too high.
Possibly a single pot wired up as a voltage divider will do the job.

I mentioned Klee because, like the Klee, you can have more than one step 'on' at the same time, so the output is a sum of the 'on' steps. Unlike a regular sequencer where only one stage is on at a time.

thinking about it more, just patch the regular stage outputs of a gated comparator into a CGS DC mixer and it will work just as well!
Crikey! I'll just go and try it


EDIT - yep, works great!

[neandrewthal]

[ericcoleridge]

[andrewF]

Now Ive had my coffee, i think the easier and more flexible route is to build a CGS DC mixer beside the Gated Comp. Build the mixer so it has 8 inputs. Using switching jacks, wire the switches of the GC shift register output stage jacks to the switches of the DC mixer input jacks.

This way, with nothing connected to the outputs of the GC, or inputs of the mixer, you can use the GC as a very effective CV sequencer.

You still have a choice of using the mixer as a mixer or the GC as a trigger source when you choose to.

Of course, not all 8 outputs of the GC need to go to the mixer, I have a patch running now with 4 GC outputs to one mixer and the remaining 4 to a 2nd mixer.
One mixer and the GC random output are connected to a CGS VCO (processor inputs). The other mixer is to a VCF, for processing the VCO's output. its a fun setup - a bit like the Klee, a few tweaks of the mixer pots results in a whole new pattern.

[ericcoleridge]

I think maybe the Quantized and Stored Random Voltage sections of Buchla 266 use a similar setup as you've described, except, instead of switches, there are resistors and/or pot to limit the voltage outputs of the individual stages pre-mix. Then by adding or subtracting possible mix inputs, you get a probablility distribution. I don't know if this is correct, but it's something I've been thinking about as an application for the GC. Does that make sense?

[andrewF]

Don't know much about the Buchla, but from your description you could get a similar output by choosing which GC outputs to patch into the DC mixer (rather than all of them) and setting the level pots accordingly. or have a look at the dual processor, the DC Mixer sums the input voltages, with the processor you can add or subtract -
http://www.cgs.synth.net/synth/serge/dual_processor.html
it would not be hard to mod a DC Mixer PCB to act as a processor.

[funkyfarm]

[zthee]

[andrewF]

I've got 3 programmers, so the gated comp outputs can be used to drive two of them simultaneously, giving related but different patterns from each.

Yes, I fully recommend having more than 1 programmer

[zthee]