how to specify the audio device in audio_comm

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I am using cmd

roslaunch audio_capture capture.launch

to launch and audio in ros which is running in pi 4B. I have logitec c270 with me whih i'm trying to use an input microphoe and camera both. Here how do i find which device file is this device and how to pass this device to the audio_capture node to captuer the audio device in pi 4B? I tried to follow this tutorial but it looks like theri is no /etc/modprobe.d/alsa-base.conf file in my pi.