Chorus?

[Marjan Urekar]

Hello all !

Few questions...

I've got this  ETI 'Wave Multiplier' article from ultranet page.It's
kind of analog chorus ,rather simple ,opamp based phase shifters.
Hope you have this schematic, and someone can help me with :

 - I want to put my old Farfisa organ trough it,which hasn't saw output
   needed for input comparator in chorus circuit.Will it work properly
   with non-saw input (sine/square)?

 - I plan to connect 3 units of choruses working at slightly different
   frequencies than original (there are two oscillators in each unit, at
   0.4 and 0.6 Hz in original,so I think about all six oscs at different
   frqs) - but how - if I connect them in series will it work (I'll
   make it on breadboard shurely,but just to ask here first),
   or to them all in parallel with common input and output summing
   opamps ? (why 3? well, Jarre had those Oxygene pads with some organ
   with 3 choruses...)

 - Is there a way to modify it's phase-changing oscillators to change
   their speed simultaneously ,keeping their relative frqs the same   
(if it makes sense anyway) by CV (propably not as they are      
closed-loop-phase-shifted type ) or I just have to make VCLFOs   
instead ?

 - Suggestion for some other diy chorus ?

Thanks,

Marjan Urekar
urekar.m at eunet.yu