Portaudio select input device for capturing

I face some problems with set up input device for portaudio.
I have 2 cards 0 and 1, and I want to configure:
card 0 for capturing, card 1 for playing.

So, I edit asound.conf like this:

asound.conf

pcm!.default

type asym
playback.pcm "plughw:1"
capture.pcm "plughw:0"



I realize portaudio can not record audio file, it's always 0 byte in record file. In case of doesn't have asound.conf in path /etc/, Portaudio works fine. So, my question is:
How can I choose input device for portaudio between 2 cards?

asound.conf

Attached is my cards:
enter image description here

1 Answer
1

You could use Pa_GetDeviceCount() and Pa_GetDeviceInfo() to iterate and list your devices. There is an example for doing so here, the one named pa_devs.c.

With this example you can identify the index of the device and use it depending on your needs.

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