If possible you should be considerate and give the viewers a choice to hear the music or not, but don't force the music on them. Which is why it is best to have them turn it on if wanted. But name the songs for them to see.
The reasons are many. A few are:
1 It is not expected and be a shock
2 It can be too loud and may be disturbing.
3 Some viewers may not like your style of music
4 It may send your viewers away
You do not know who if anyone is listening to the music. You do not know how many viewers are turned away or were unhappy.
You do know that you are listening though. If you are happy with that fine.
I am guilty of that too. I did a site a few years ago that I need to update for those very same reasons.