First unit tests good. The switch is at address 0x70 and the POTs are 0x28-0x2D.

        Ping Map
              0 1 2 3 4 5 6 7 8 9 A B C D E F
        0x00:   . . . . . . . . . . . . . . .
        0x10: . . . . . . . . . * . . . . * .
        0x20: . . . . . . . . * * * * * * . .
        0x30: . . . . . . . . . . . . . . . .
        0x40: * . . . . . . . . . . . . . . .
        0x50: . . . * . . . . . . . . . . . .
        0x60: . . . . . . . . . . . * . . . .
        0x70: * . . . . . * * . . . . . . . .

Published schematics.

The previous version of this board has a library that worked well, and included an abstraction layer for i2c on Arduino and Linux (for use with an SBC). I'd like to port those features over, but the main library effort is for Arduino right now. The drivers for the elements of this board are both ready, but the class that ties them together is what adds many of the worthwhile features.

I've sent off for a revised board with better silkscreens. Any orders will receive the new boards.

Immediate software goals (in order of urgency):

• Finish porting of AudioRouter class.
• Finishing basic example sketch to fully demonstrate board.
• Finishing sketch to demonstrate audio ducking and cross-fade
• Porting linux console example program

Hardware surrounding this board might include (in no particular order):

• 1/8" simple jack board with input buffers and no digital elements
• 1/8" complex jack board with input buffers and monitoring ADCs on the input side
• A Teensy adapter board
• A modular analog synth backplane 
• Differential adapter boards