/usr/share/ is in libasound2-plugins 1.0.27-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/alsa/
/usr/share/alsa/alsa.conf.d/
/usr/share/alsa/alsa.conf.d/50-pulseaudio.conf
/usr/share/alsa/alsa.conf.d/99-pulseaudio-default.conf.example
/usr/share/doc/
/usr/share/doc/libasound2-plugins/
/usr/share/doc/libasound2-plugins/speexrate.txt
/usr/share/doc/libasound2-plugins/README-pulse
/usr/share/doc/libasound2-plugins/README-pcm-oss
/usr/share/doc/libasound2-plugins/README-arcam-av
/usr/share/doc/libasound2-plugins/upmix.txt
/usr/share/doc/libasound2-plugins/vdownmix.txt
/usr/share/doc/libasound2-plugins/examples/
/usr/share/doc/libasound2-plugins/examples/asound.conf_jack
/usr/share/doc/libasound2-plugins/examples/asound.conf_oss
/usr/share/doc/libasound2-plugins/README-jack
/usr/share/doc/libasound2-plugins/speexdsp.txt
/usr/share/doc/libasound2-plugins/copyright
/usr/share/doc/libasound2-plugins/changelog.Debian.gz
/usr/share/doc/libasound2-plugins/samplerate.txt