Instrument Volume

This is a problem for me and my friends. The instruments are ear piercingly loud when played and distorts the audio greatly. It really ruins the instruments for me and everyone, especially after I put in a lot of work to import my own songs into the game so they can be played and enjoyed in game. But as of now it's impossible to enjoy it without bleeding ears. Something like an audio mixer or a volume slider, or just reducing the sound of the instruments overall would be a fine fix to this problem.