[sdiy] simple mixer question.

[Dave Kendall]

Hi all.

I'm thinking of building a simple stereo submixer for my keyboard rig. 
It only needs attenuation on each channel, no pan or EQ or anything.

The classic dual inverting opamp summer seems the place to start. (2 of 
these http://www.cgs.synth.net/modules/cgs04_mix.html  for example)

Is there a practical limit to how many inputs this circuit will take 
without problems?
I was thinking along the lines of about 8 to 12 inputs per circuit.

Any thoughts appreciated. (I need something smaller than my Mackie 3204 
  for small gigs ;-)


cheers,
Dave