i'm ordering a couple ICS-43434 now, thanks for the tip BuddyCasino,

As for I2S_COMM_FORMAT_RAW_I2S flag, ??? sorry about that, I blame it on blurry vision and lack of sleep. I intended to write "I2S_COMM_FORMAT_I2S"

from my tests, i have found that using "I2S_COMM_FORMAT_RAW_I2S" gave better precision and quality than using "I2S_COMM_FORMAT_I2S_MSB" for the i2s_config_t.communication_format. To give an example: with "I2S_COMM_FORMAT_RAW_I2S" the min max values in a semi quiet room are: min:~62130 to max:~62190 ...

I was able to confirm the code presented here works. I have one problem though, when attempting to calculate the voltage of the audio signal, the min / max values coming in from i2s is really high. For example, in a silent room i'm getting a min max threshold of about min:62300, max: 62345 I am able...

I finally made some progress after updating to 2.1 of the SDK I was able to use core elements of the code from BuddyCasino successfully to grab audio data from my i2s microphone ( SPH0645 ) I was able to successfully record audio, however the audio is quiet and easily peaks out. I noticed when worki...