how dev/snd/hwC file descriptors are generated ?

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how dev/snd/hwC file descriptors are generated ?

Rajat
i am working on qualcolm 8195 board with android 10 . I enable the loopback sound card which is card 0 while default card in qualcolm is card 1 . Looking at the generated file descriptors in /dev/snd/ hwC i am only able to see hwC1DXX but cannot see any file descriptors for the loopback card. How to generate those file descriptors for card 0 ?
I want to generate /dev/snd/hwC0DX too.

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