I use sound effects, and sometimes songs heard in the distance in the game world. Not exactly the same as background music, but background sounds in the world which are sometimes a song. Examples: I use dripping water, bats, and wind sounds (in the caves). When the players were outdoors and they encountered a gypsy encampment, I had some acoustic gypsy songs -- so it wasn't a background song, it was more like replicating the song the PC's were hearing in the world. In other words I don't play a whole orchestra playing a music soundtrack with modern instruments, but I will play a medieval Lute song if someone in the world is playing a lute. I've found these sounds in Roll20 in the Jukebox in Soundcloud. Here is a thread under Suggestions that you can vote +1 if you like, Alternatives To Soundcloud / Jukebox, and in this thread I've listed links to other threads requesting various Sound related services and improvements, <a href="https://app.roll20.net/forum/post/1245252/alternat" rel="nofollow">https://app.roll20.net/forum/post/1245252/alternat</a>...