unused pins of Audio board

[WMXZ]

I guess this is a question to Paul:

can you confirm that the unused pins on the audio boards have no internal connection?
Reason: I would like to stack two audio boards and use unused pins to pass relevant pins from second board to Teensy.
I may do that for T3 and T4

 

[PaulStoffregen]

can you confirm that the unused pins on the audio boards have no internal connection?

Yes, confirmed, unused pins are just pads on the PCB without any connection.

The audio shield circuit board is only 2 layers, so it's also pretty easy to visually see no trace connects on either side.