I'm trying to use ADAU1381 eval board to record signal from on board microphones to I2S output with ADAU chip being master on I2S bus.
I got the chip producing BCLK and LRCLK but I see non zero data on the ADC output only when FrameMode set to TDM4 or 8 but not in Stereo. I have bypassed all elements (wind cancelation, equalizer, etc..) so I basically just want to see the ADC working. Any Idea what might be causing this is appreciated. Is there reference project that demonstrates recording from on board mics to I2S?