add audio

hc

2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

 kernel/COPYING
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@@ -16,3 +16,5 @@
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 	Documentation/process/license-rules.rst
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 for more details.
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+All contributions to the Linux Kernel are subject to this COPYING file.