$   apt list *audio* | grep installed

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

gstreamer1.0-pulseaudio/cosmic,now 1.14.4-1ubuntu1 amd64 [installed]
kio-audiocd/cosmic,now 4:18.04.3-0ubuntu1 amd64 [installed]
libaudio2/cosmic,now 1.9.4-6 amd64 [installed]
libaudio2/cosmic,now 1.9.4-6 i386 [installed,automatic]
libaudiofile1/cosmic,now 0.3.6-4 amd64 [installed]
libportaudio2/cosmic,now 19.6.0-1 amd64 [installed,automatic]
librtaudio6/cosmic,now 5.0.0~ds-2 amd64 [installed,automatic]
libspatialaudio0/cosmic,now 0.3.0+git20180730+dfsg1-1 amd64 [installed,automatic]
libwebrtc-audio-processing1/cosmic,now 0.3-1 amd64 [installed,automatic]
pulseaudio-module-bluetooth/cosmic,now 1:12.2-0ubuntu4 amd64 [installed]
pulseaudio-utils/cosmic,now 1:12.2-0ubuntu4 amd64 [installed]
pulseaudio/cosmic,now 1:12.2-0ubuntu4 amd64 [installed]
xfce4-pulseaudio-plugin/cosmic,now 0.4.1-1ubuntu1 amd64 [installed,automatic]