Modular Synth Panels

>
>  1) Regarding the long/short adsr option - determined by switching 
> (SW2) "TSW" between ground or not. When TSW is grounded, are the ADSR 
> times long or short?? I guess I could figure this out after I wire it 
> up, however I'm debating on whether I want to use the extra hole on 
> the panel for a adsr time switch or a manual gate...

The larger the cap, the larger the time. When caps are wired in 
parallel, their values are added together. So, grounding that switch is 
for "long" time.

>
>  2) I purchased the CGS04 DC Mixers so I could invert the output of 
> the ADSR. How do I implement this? I understand that the TL072 is a 
> dual opamp, and in the CGS04 the first opamp in the TL072 inverts the 
> input signal (makes it negative) and then inverts the signal again 
> (making it positive) with the second opamp. How can I safely skip one 
> of the opamps so I can use the inverted signal on my panel? Or, do I 
> use both opamps? I see three possible methods, however I don't know 
> which one is right.
>  2.1) Can I take the inputs and take them directly (after their 100k 
> resistors) to pin 6 of the TL072 and leave the rest of the circuit as 
> is?
>  2.2) Can I skip the 100k resistor between the two opamps, taking the 
> signal from pin 1 to the 1k resistor, and then take the signal from 
> the resistor directly to the output (skipping the 100k resistor in the 
> ?feedback loop? of opamp2)?
>  2.3) Use both opamps as the circuit diagram shows, however use the 
> additional circuitry in Red. << I have absolutely no idea what this 
> stuff is doing. Also, as I won't be using pots on this circuit, I 
> don't know what I'll be connecting to points B & C.......

A Bridechamber Inverter PCB would work best : )
It was pretty much designed for this application. And Ken designed it!

>
>  Here are the URL's for reference
>  MFOS ADSR:
> http://www.musicfromouterspace.com/analogsynth/ADSR001/ADSR001.html
>
>  CGS04 DC Mixer:
> http://www.cgs.synth.net/modules/cgs04_mix.html
>
>  Any help is greatly appreciated,
>  Jim
>
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