I once had a guy pull up 20 ft from me on a sand bar and crank up some country music. After a few songs, he yelled over to me, "The best thing about country music is that no one minds if you play it really loud."
I looked back at him and said, "What?".
He repeated. I repeated.
It took 3 rounds before he finally got the message.
Believe it or not, most people don't want to hear what you're playing.
Once we are anchored, one of us will usually walk out about 20 feet off the stern and see if we can hear our music. That's about as far as I want it to travel.