I probably play music louder than your daughter and all my snakes are fine. As someone said, unless its vibrating the tank, it shouldnt bother it.

Defecation can vary alot. Some of mine go once a month, some go only after they shed which is longer than once a month usually, and some go randomnly lol. Usually they pee at least once or twice a week. (Or at least most of mine do).

Congrats on your new pet and welcome to the addiction!