Reading from a Microphone

I managed to use Alsa API so I can read the microphone. My codes runs without any issue now and I read values but not sure if they are correct.

I set up the mic setting at it as instructed here

https://www.hifiberry.com/docs/hardware/using-dynamic-microphones-with-the-dac-adc/

but when I run the command uname - a, I get

Linux raspberrypi 6.1.29 -v8+ SMP PREEMPT Wed May 24 14:46 BS 2023 aarch64 GNU/Linux

Not what I expect.

arecord -l

# arecord -l
**** List of CAPTURE Hardware Devices ****
card 2: sndrpihifiberry [snd_rpi_hifiberry_dacplusadc], 
 device 0: HiFiBerry DAC+ADC HiFi multicodec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I read the same value with or without a mic connected via jack.

Any idea why I cant read the actual input from the mic. I doubt anything is wrong with my codes.

Reading from a Microphone

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