Were you thinking about something like this?

**Tip:** The default source can be referred as `@DEFAULT_SOURCE@` in commands, for example: `$ pactl set-source-mute @DEFAULT_SOURCE@ toggle`

Default sink:

@DEFAULT_SINK@

I think this should work (I haven’t tested it):

make a new file called default (.) pa in the pulseaudio congfig folder (.config/pulse)

this will mute source_name (replace source_name with your source name):

#include this config file
.include /etc/pulse/default.pa
set-source-mute source_name true

run this command to list source names:

pactl list short sources

Most translators aren’t perfect, they generally can not understand context

you can export to pdf and the text is searchable (in firefox with ctrl f)

I can recommend lmms too