CatGirl Synth: Difference between revisions

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== 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 1990s1999, 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://muffwigglermodwiggler.com/forum/viewtopic.php?t=207046 CGS Site going, going.....], MuffMod 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 |deadurlurl-status=yesdead |df= }}</ref>
 
== Building a DIY synthesizer ==
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== 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 ===
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: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]]
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* <!-- cgs77_vcf.html -->CGS77 [[CGS Serge 1973 voltage controlled filter|Serge 1973 Voltage Controlled Filter]]
:This is an adaptation of the original Serge VCF from the early "R" series PCBs. Produced under licence from Serge.
* <!-- cgs101_dcsmcgs101_base.html -->CGS101 [[CGS Serge dualquad channel stereo mixer (DCSM)|Serge Dual Channel Stereo Mixer (DCSM)VCA]]
:This module is a variation on the Serge Quad Voltage Controlled Amplifier (QVCA) module, built using the CGS108 VCA.
* <!-- cgs101_dcsm.html -->CGS101 [[CGS Serge dual channel stereo mixer|Serge Dual Channel Stereo Mixer]] (DCSM).
:This module is a variation of the Serge Dual Channel Stereo Mixer, built using the CGS108 VCA and the CGS102 Equal Power Panner drivers. Produced under licence from Serge.
* <!-- cgs102_epp.html -->CGS102 [[CGS Serge equal power panner|Serge Equal Power Panner]]
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* <!-- cgs25_keyscan.html -->CGS25 [[CGS keyboard scanner sub-module|Keyboard Scanner Sub-Module]]
:This board was really developed for Ken Stone's own use, to allow his 486 based sequencer to connect to various keyboards.
* <!-- paraport.html -->[[Ken StoneCGS parallel port adapter for IBM PCs|Parallel port adapter for IBM PCs]]
:The adapter that Ken Stone used to interface to his DCOs and keyboard.
 
=== Other original designs ===
* <!-- pic/arc_weld_mods.gif -->[[CGS arc-welder mod]]
* <!-- comparator.html -->[[CGS gated comparator]]
* <!-- gate_sequencer.html -->[[CGS gate sequencer]]
* <!-- organ_interface.html -->[[CGS organ interface]]
* <!-- phaser.html -->[[CGS phaser]], this is the ETI 447 audio phaser in combination with a stereo phase adapter
* <!-- cgs208_wad.html -->CGS208 [[CGS Serge Wilson analog delay|Serge Wilson analog delay]]
* <!-- v8sim.html -->[[CGS V8 and diesel simulators]]
 
=== Modules from other sources ===
* <!-- 6bn6flanger.html -->[[CGS beamCarlsbro modulatorflanger]]
* <!-- phaser.html -->[[CGS phaser]], this is thecombo ETI 447 audio phaser inand combination with a stereoshifty phase adapteradaptor]]
* <!-- tubevcflfo.html -->[[CGS tubedual bandpassASM-1 and Modulus VCFLFOs]]
* <!-- 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]]
* <!-- programmervca.html -->[[CGS sequencermixer programmerand ETI 4600 VCA]]
* <!-- motm100.html -->[[CGS MOTM 101 noise, S&H and vibrato]]
* <!-- ../tube/beamvocal_filter.html -->[[CGS tubeRoland VP300 beamvocal modulatorfilter]]
* <!-- rhythm.html -->[[CGS Welson Festival 2000 drum simulator]]
* <!-- cgs208_wad.html -->CGS208 [[CGS Serge Wilson analog delay|Serge Wilson analog delay]]
 
=== Tube modules ===
* <!-- 6bn6.html -->[[CGS beam modulator]]
* <!-- programmer.html -->[[CGS vintage sequencer/programmer]]
* <!-- tubevcf.html -->[[CGS tube bandpass VCF]]
* <!-- tube_psu.html -->[[CGS tube module power supply]]
* <!-- noise.html -->[[CGS tube noise source]]
* <!-- tubevco.html -->[[CGS tube VCO]]
* <!-- tubevcf.html -->[[CGS tube bandpass VCF]]
* <!-- ../tube/beam.html -->[[CGS tube beam modulator]]
* <!-- 6bn6.html -->[[CGS beam modulator]]
* <!-- hellfire.html -->[[Metasonix TS-21 Hellfire Modulator]]
* <!-- programmer.html -->[[CGS sequencer programmer]]
* [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 ==
* [[CGS parts FAQ]]
* [[CGS simple transistor matching guide]]
* [[Audio synthesis via vacuum tubes]]
 
== References ==
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== 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 ===