Mic not working in tegra T20 with Col Evaluation board V3.2A

Mic is not working and not able to record the audio. I am following the process give in toradex website.
Please help.

What exact hardware/software versions are you talking about (e.g. module variant/version, BSP version)? What kind of a microphone are you using? How exactly does your process look like (e.g. terminal output)?