Yes but the A9 chip has digital audio built in. With a lot of microcontrollers they have more stuff than pins so pins can be set to different functions which is what I was asking. I wish vex would share the schematics or board files because they would be very cool to look at but I don’t think that will ever happen.
No it doesn’t, where did you see that ? Other SoC built around the A9 may offer I2S as an additional block in the SoC, but the one used in the V5 doesn’t.