[alsa-devel] How to find out which PCM handle ASCII identifier to pass to snd_pcm_open?

I have just started learning ALSA's api, and came accross some examples at http://equalarea.com/paul/alsa-audio.html, which pass argv[1] to snd_pcm_open.

My question is which should be the values of argv[1] for the microphone, and left and right speakers devices?

I'm not sure this is the right mailing list for this question, and I apologize if not :-)

Thanks,

Andre