MUFF WIGGLER Forum Index
 FAQ & Terms of UseFAQ & Terms Of Use   Wiggler RadioMW Radio   Muff Wiggler TwitterTwitter   Support the site @ PatreonPatreon 
 SearchSearch   RegisterSign up   Log inLog in 
WIGGLING 'LITE' IN GUEST MODE

Triple Wave Shaper - differences between CV inputs
MUFF WIGGLER Forum Index -> Buchla, EMS & Serge  
Author Triple Wave Shaper - differences between CV inputs
kbithecrowing


I've been looking at Ken Stone's schematic for the Triple Wave Shaper and I'm curious about how the two VC inputs differ in use. I'd guess that VC 1 would have more "non-linear" effects since it's only being applied to one input of the op amp prior to feedback, but I don't really know how that'd translate in practice. I'd be curious to hear audio examples / see oscilloscope shots comparing the two if anyone has them smile
djs
Serge-fans is saying that the TWS was originally a waveshaper for their oscillators. In looking at the CGS48, the input for VC1on the TWS looks very similar to the shape cv on the CGS48, which means that it would be a saw to sine shaper. Not sure what it would do if you fed something other than a saw into it:

https://www.elby-designs.com/webtek/cgs/cgs48/archive/schem_cgs48_vco. gif
kbithecrowing
Interesting, that schematic shows the shaping function implemented like VC in 1 on the triple wave shaper. I wonder if applying CV to both inputs before the feedback loop, a la VC in 2, has a rectifying affect...

I'm planning on building my own relatively soon and will investigate, I'm mainly curious if anyone has any insight on the difference between the two in practice Mr. Green
the bad producer
Did a quick video for you - magenta trace is input waveform, yellow is output, level knob at halfway. First 0-5V VC1, then 0-5V VC2.

https://loudestwarning.tumblr.com/post/187513794746/tws-vc1-vs-vc2-mag enta-trace-is-input-waveform
kbithecrowing
the bad producer wrote:
Did a quick video for you - magenta trace is input waveform, yellow is output, level knob at halfway. First 0-5V VC1, then 0-5V VC2.

https://loudestwarning.tumblr.com/post/187513794746/tws-vc1-vs-vc2-mag enta-trace-is-input-waveform


Ahhh that's perfect! I was debating between wiring up both vc inputs or both (ac/dc) outputs, this definitely makes the importance of both vc inputs clear. Maybe I'll still squish both outputs in there... Thank you for this, and all the other inspiring work you do thumbs up
MUFF WIGGLER Forum Index -> Buchla, EMS & Serge  
Page 1 of 1
Powered by phpBB © phpBB Group