Stereo Audio Input on Jetson TK1

Hello all, first time poster here, curious about having two channels from one microphone OR two mono microphone signals making their way onto the TK1 board.

Is this something that is possible?

Does it require software tweaks, or the use of an alternate point of entry than the microphone jack?

Thanks for your help!

It is possible. Audio codec used on Jetson TK1 is Realtek ALC5639, the interface between it and TK1 is DAP2, and TK1 uses I2C to configure ALC5639. So if you want to implement two channel mics, you need to configure codec by I2C and also do some wire change accordingly.

Okay, that’s good to know. What is a DAP2 interface? Can you explain how the codec is configured, or what changes are necessary for the connections between the ALC5639 and the audio inputs?

DAP is digital audio port, you can get more info in design guide:
https://developer.nvidia.com/embedded/dlc/tegrak1-embedded-design-guide

Two channels mode is not supported on default TK1 board and driver, I think you might need to check with Realtek to get the the connections and configuration guide.