Cgs synth

On 4/12/07, James Elliott put forth:

>I ordered the MOTM Bridechamber version from Scott. I had some
>difficulties initially with the construction, however once I got
>everything figured out it worked fine

After looking at the docs, the daughter board for the VCO outputs
seems a possible source of confusion. It says "You need to bend two
pins so that they do NOT go into the socket," but the schematic shows
all eight pins -- as one would expect -- of the dual op-amp being
used.

>(BEWARE THE 'REVERSE' POWER SUPPLY PIN-OUTS! - I'm supprised I
>didn't fry everything on the board).

The power supply pins don't follow MOTM format?? I could see how
that could cause a problem. Do you need to make a special cable??

>The panel looks good & it was pretty easy to build. As for the
>module itself - I consider it more of a VCO than a filter. It's as
>much of a filter as a flanger is..... Meaning it does not really
>resemble a filter :) To me its seems more of a frequency shifter,
>with some added crazyness. HOWEVER I personally think that it is a
>pretty cool module once you realize what it is vs what it isn't

While I have no idea how it could sound like a frequency shifter, I
do like the demos that I have heard -- very impressive. That it can
be used either as a regular VCO or an unusual filter makes it seem
much more practical.

Also, while I'm typing, the schematic on the CGS website shows a both
1V/Oct and linear FM inputs, but the Bridechamber panel looks like it
has a an "EXP FM" input. Is the linear FM input unused??


http://www.bridechamber.com/bi_n_tic_big.html
http://www.cgs.synth.net/modules/pic/schem_cgs57_bintic.gif