[sdiy] Speaking of the Elektor Vocoder (and the Korg Vocoder)

[anthony]

I really liek this circuit, but I'd really like to update it to use OTA's I 
can really get. I like the backplane idea. I'm in preliminary stages of 
redesigning the circuit-board so that two filter units are on one board. 
That way you could use one LM13600/LM13700/NTE870 for two filter units.

I wondered: would it be better to just design the circuit board to fit the 
bigger chip, but leave one OTA unit unused. This seems like a waste, but 
could there be any possibility of interferance of two circuits. I wouldn't 
think so. I'd hate to waste that many OTA units too. But it looks like the 
board will have to be seriously redesigned. I think maybe I will end up 
using protoboards after all.

Has anybody on this list made a vocoder recently? I have some VST plug-ins 
and just don't like them even some expensive ones. I really want the 
schematic for a simpler vocoder like Korg's awesome little unit. Heck, I'd 
love to buy one of those little guys on eBay. I'd make mine a faithful 
replica, with the little keyboard, bendy mic stand, and VU meter. But I 
haven't been able to find the schematic for it.

cheers,
Anthony