add audio

hc

2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

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# Locally computed:
sha256 d846066e27c3072565990745d030357aa0c278f96b7d1d4f59023347c1db8824  ser2net-3.4.tar.gz