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Line 3: == History == [[File:CGS photo jan 2002.jpg\|thumb\|right\|500px\|Ken Stone's synth as it was in Jan 2002]] The CGS web page chronicled and supplied details of the construction of Ken's own modular synthesizer. The site itself was simply titled "Modular Synth". After other parties started referring to it as the "Catgirl Synth", Ken adopted the letters CGS as identifiers on his PCB designs.<ref>[https://web.archive.org/web/20030407200638/http://cgs.synth.net/ 1999], CGS - archived</ref><ref name="ks">Information provided by Ken Stone.</ref> The web page first came online in ~~the late 1990s~~1999, and moved several times before settling at [https://web.archive.org/web/20171001113317/http://www.cgs.synth.net/ www.cgs.synth.net]<ref name="ks" /> It closed down in September 2018, with [http://www.elby-designs.com/webtek/cgs/cgs.htm Elby Designs] taking over the CGS projects and the rest of the site archived at [https://web.archive.org/web//cgs.synth.net Archive.org]<ref>[https://~~muffwiggler~~modwiggler.com/forum/viewtopic.php?t=207046 CGS Site going, going.....], ~~Muff~~Mod Wiggler forum, Sep 2018</ref> == Format == CGS is based around the [[4U]] format, with +/-15 volts supplied via [[MTA connector\|0.156 4 pin MTA]] connectors and either [[Connectors\|banana sockets or 3.5mm jacks]].<ref>{{Cite web \|url=http://www.elby-designs.com/webtek/cgs/parts_faq.html \|title=CGS parts FAQ \|accessdate=2018-10-07 \|archiveurl=https://web.archive.org/web/20161105181508/http://www.elby-designs.com/webtek/cgs/parts_faq.html \|archivedate=2016-11-05 \|~~deadurl~~url-status=~~yes~~dead \|df= }}</ref> == Building a DIY synthesizer == Line 38: == The CGS modules == [[File:cgs panel gate sequencer.jpg\|thumb\|right\|The panel after which CGS was named.]] These designs are for advanced builders and experimenters. They have been built and they have worked satisfactorily. Obviously only very few from the the variety of available component brands have been tried in each design. This is Ken's hobby and he has shared what he has done with other interested parties.<ref name="help">''[https://web.archive.org/web/20170420052751/http://www.cgs.synth.net/help.html Please read this before attempting to build anything from these pages.]'' ~~(archived)~~, with permission of the author Ken Stone - archived</ref> === CV processors === Line 121: :The Serge noise module can be built in several ways. In it's simplest form, it contains three basic outputs, white noise, pink noise, and a random voltage suitable for use with sample and hold modules. An optional sample and hold circuit is included on the PCB. Alternatively, the basic version may be coupled with the [[CGS Serge smooth and stepped generator\|CGS92 Serge Smooth and Stepped Generator]] to make the Random Voltage Generator module. <!-- cgs92_ssg.html -->CGS92 [[CGS Serge smooth and stepped generator\|Serge Smooth and Stepped Generator]] * <s><!-- cgsssg_ssg.html -->CGSSSG [[CGS Serge smooth and stepped generator (previous version)\|Serge Smooth and Stepped Generator (previous version)]]</s> :The Serge Smooth and Stepped Function Generator (SSG) is a complex multi-functional module to provide various slew and sample functions. * <!-- cgs86_trk.html -->CGS86 [[CGS touch responsive keyboard\|Touch Responsive Keyboard]] Line 340: * <!-- lfo.html -->[[CGS dual ASM-1 and Modulus LFOs]] * <!-- 5band_eq.html -->[[CGS dual ETI 414 master mixer]] * <!-- ts21.html --> [[Audio synthesis via vacuum tubes/Metasonix TS-21 hellfire modulator\|Metasonix TS-21 hellfire modulator]] * <!-- ts22.html --> [[Audio synthesis via vacuum tubes/Metasonix TS-22 pentode filterbank\|Metasonix TS-22 pentode filterbank]] * <!-- ts23.html --> [[Audio synthesis via vacuum tubes/Metasonix TS-23 dual VCO\|Metasonix TS-23 dual VCO]] * <!-- vca.html -->[[CGS mixer and ETI 4600 VCA]] * <!-- motm100.html -->[[CGS MOTM 101 noise, S&H and vibrato]] Line 353 ⟶ 356: * <!-- noise.html -->[[CGS tube noise source]] * <!-- tubevco.html -->[[CGS tube VCO]] * <!-- hellfire.html -->[[Metasonix TS-21 Hellfire Modulator]] * [https://www.schmitzbits.de/vtvcf.html René Schmitz VCF] <ref>''[https://web.archive.org/web/20180209234644fw_/http://www.cgs.synth.net:80/modules/index.html Modules and how to build them.]'' ~~(archived)~~, with permission of the author Ken Stone, 1999 - archived</ref> == See also == Line 366 ⟶ 368: == External links == * [https://groups.yahoo.com/neo/groups/cgs_synth/info CGS synthesizer support], Yahoo group * [https://web.archive.org/web/20170430151727/http://cgs.synth.net/ "Modular Synth", the CGS web site] on Archive.org * [http://www.synthpanel.com/ "Modular Synth", the CGS web site] on synthpanel.com * [https://groups.yahoo.com/neo/groups/ModularSynthPanels/files/Cat%20Girl%20Synth%20Designs/ Cat Girl Synth panel designs] * [http://electro-music.com/forum/index.php?f=165 Ken Stone designs - CGS] forum at electro-music.com * [https://web.archive.org/web/20160608101311/http://www.serge.synth.net/ Serge Modular Music Systems], Ken Stone's historic Serge Modular web site === PCBs, kits and ready made CGS modules ===