Feature Request: Music Volume Slider

Me and a friend are planning to play through the game together using Anchor. Since we'd each have our own device to play on in the same room, we'd have 2 instances of music playing at the same time,

Playing with sound is very important for the both of us, so the ideal scenario would be, one of us has music enabled, and the other has music disabled. That way, we could both play with sound without 2 music instances playing simultaneously, and drowning each other out.

The issue names no file, test, or entry point. Start by locating the game's music playback and audio settings code, then trace how sound options are applied on each device. Done means users can independently adjust or disable music so two game instances do not play music simultaneously.

Written by the indexing model from the issue text.