Eric uses music to add dimension to his characters, explaining "Music can be an effective way to get to know a character since music is very personal." We see this all the time in film, especially to set a mood, but I'm not sure how common this is in novels.
But as I thought about it, I have used music to emphasize key themes in my writing, but in a very different kind of way from what Eric describes.
The murders in my first novel, A Murder at Rosamund's Gate, are largely described through ballads, broadsides and other penny pieces... which is how 17th century Londoners would have learned about crimes within their community.
Murder was literally described in verse, sung by booksellers on street corners, in a sort of a half fictional, half truthful way.
Take, for example, this 1660s ballad which I chose at random from the Early English Books--a large collection of penny press from the 16th to the 19th centuries.
As always, the title provides a synopsis to the reader (or listener, as neighbors and friends would read these ballads out loud): The downfall of William Grismond: or, A lamentable murder by him committed at Lainterdine in the county of Hereford, the 22 of March, 1650, with his woful [sic] lamentation.
(Ironic, of course, given that his love is lying on the ground, having been murdered at his hands. The audience would have gotten the joke).
But the point is that the story wasn't meant to be just read, but sung according to a well known popular tune.
So I'm curious...If you write, do you deliberately use music as a way to develop themes, characters, mood etc? If you are a reader, do you hear a soundtrack play as you read? Do you want to?