MOTM

>So, this mixer would have 6 or 7 inputs-- four AC or DC reversing and 2 or 3
>DC inputs with at least one without any attenuation.  So, you have 4
>reversing knobs and one or two non reversing knobs.   The mixer would have 2
>or 3 outputs.  One would be the high accuracy "DC-only" outputs (and maybe
>an inverted output).  The other output would be a combination of ALL inputs.
>You could put a master level control on this output too.   So, you could
>have all the features I hear people wanting.  High accuracy DC (3 in 1 out),
>reversing inputs for AC or DC, ability to mix AC and DC, and the DC does not
>get compromised with the "drift" or other bad things until the final output
>op amp that is selected for audio performance. You have the good 1013 DC
>output before you get to that stage.

Maybe I'm missing something here, but do you need more than one
opamp for gain make-up?  I thought the goal was the less the better.
Personally I'd like to see all the inputs treated equally.  If
people want AC coupling on a few of the inputs they can tack solder
a cap on the input jack.  Or use TRS jacks - half-inserted would
be AC coupled, all the way in would be DC coupled.

-Cary