LG Soundbar - change center channel volum

I have an LG SK10Y soundbar, that has a bug with the center channel. The center channel volum seems to be muffled every time I turn on the sound bar, so I have to take the center channel down to -6 and then up +6 each time I turn on the soundbar to ensure proper sound from the center channel, or else the dialouge very hard to hear.

However I’m not sure how to go forth automating this.
I’m unsure if it’s possible to use media_player function for this