[Alsa-user] Selecting apropriate input for microphone

[Fabio G. <fab...@gm...>]

I have a NVidia ALC662 sound card. I wish to read sound from the
microphone using ALSA api in C.

Read the "default" does not work I use another input a program called
Audacity, it recognizes inputs list and allows me to choose the
appropriate. How do I list the possible entries for ALSA, using ALSA
api and choose Rear Mic (microphone) in C?
(I can read/write sound using ALSA would like to be able to find the
appropriate input)