opening screen shot volume

So, can someone explain to me why the halo 5, guardians, opening/welcoming screen shot (whith the male chanting/choir & space cruiser), volume, decreases to almost half its starting level when you push start, and the mssg reads"connecting to lobby" ? This bugs the crap out of me, because now I have to turn my amplifier up more, to compensate for the drastic volume loss. Just wondering, software glitch?

Idk maybe to show that you’re choosing what you want to do while the opening screen is more for the spectacle.

Check to see what you have your music volume set to in the settings. I turned my music volume down, and it plays full blast on the title screen as if I hadn’t turned it down because the game hasn’t read my personal configurations yet. I press Start(Menu Button), and it turns down accordingly to my settings. You may have yours set lower.