MOTM

This requires:

a) invert output #1to get #2
b) level shift both up (add +5V)

You can build a $2 circuit to do this. All it take is 1 TL074 Quad op amp and about 8 resistors.
You cam mount it on a MOTM breadboard behind a 1U blank panel. Or, you can use a MOTM-830 mixer,
and swap out 2 resistors to get the gain (it can already level shift).

Paul S.
*really* pissed :)