I'm working with the USB4715EVM and messing around with the Configuration registers using the MPLAB Connect tool.
By default, the digital mics are not enabled. I know this by sniffing the I2C writes from the hub to the codec and seeing that codec ADAU1961 address 0x4019 is being written as 0x13, which sets bit INSEL to zero. Also address 0x4008 is not written to, leaving JDFUNC as 0, when it should be 2.
I have changed these register values so that INSEL = 1 and JDFUNC = 2. I'm still not getting any audio input on my PC. Is there anything I need to do for the USB4715 to get input audio to work? I understand this question has a lot to do with the Analog device, but considering Microchip's EVM contains this part and the digital mics, I thought I would ask.