Help controlling pc audio through home assistant

hey all, i have recently been trying to fiddle with controlling my pc audio volume through home assistant but as i am using an audio mixer (a beacn mix to be precise) i am unsure of how i can accurately adjust audio volumes,

i have multiple audio channels set up for different things but am wondering if / how, it might be possible to route only the browser volume through home assistant for me to control, i am using hass agent but cant find any precise options to select an audio channel and i am unable to find any other things that i can use to control the pc volume

any help is appreciated!!

edit: it would also be much easier if the whole audio line out output is controlled instead of an individual channel so whatever works, i just ned to figure out how to select an audio channel to be controlled somehow