Modular Synth Panels

On 5/9/08, James Elliott put forth:
>I've got a couple newbie questions for the group (standard
>disclaimer: I have no EE experience, I'm learning slowly as I build
>this stuff).

I would recommend taking some time to study an op-amp primer:

http://www.national.com/an/AN/AN-20.pdf

If you do a web search, you will find several others.  There are also
virtual labs on several manufacturers' websites that allow you to
plug in different values and see what happens, such as this one:

http://designtools.analog.com/dtAPETWeb/dtAPETMain.aspx?part=OP275#RunAnchor


While all sorts of complicated things can be built using op-amps, by
learning two basic circuits -- the inverting amplifier, and the
non-inverting amplifier -- you will be able to answer all of your
mixer/inverter questions.