Yamaha CS80

Well, I guess he means I've been working on discrete equivalents for 
years.  Robert Rich has my rework of the VCO sone as a module; he wants 
more of them, so I guess it at least works.  The filters I already did.  
The VCA is on the charts.  The EGs are at least soldered prototypes.

  But its is the control system I really want to remake.  The key 
assigner, glide/protamento logic, and so on.  I made a schematic of what 
I'd do some years back, and it will change a bit, but it is all 
essentially in there.  The key assigner is not easily remade as it is a 
ternary encoder, using both the +8.5v to 0v and 0v to -6.5v transistions 
for the octave and note select.  Then there is all that synchronous 
clocking of registers they used in random logic to operate the many 
analog switches to reduce key velocity/AT to the eight voices.  Its the 
way they built things back then that simply will never be repeated that 
I have to faithfully recapture.  I mean, no one is going to put over 200 
VCAs in a production synthesizer ever again--the CS80 and the Electone 
series in general will be a big chapter in my book, "Why They Built 
Things the Way They Did, and Why They Will Never Build Them That Way 
Again." ;)

  JH is interested in the VCA, so maybe I will get remotivated...

Scott
/**/

JH. wrote:
>> Now that Juergen has one i feel a lot better about the future of the beast,
>> i know he will think of something clever..
>>
>> What do you say juergen?? :)
>>     
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> That Scott Rider is the CS-80 man. :)
>
> JH. 
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