Do you (or have you considered) using references to music (likes and dislikes) as pointers to your characters' personalities?
For all of my main characters (and a few others) I draw up a "Desert Island Discs" list of eight tracks. Some of these get annotated with reasons the character would choose them; most do not.
I try to both stick within the eight tracks and make sure that everyone gets their full quota - this can be a revealing exercise.
I think that this (among other things) helps me to "round out" characters. Sometimes it gives me useful insights that I may or may not reveal in the main text.
So... Does anyone else get up to this? Would you now consider it?
:-)
I use music to help me think of what to do with my plot and characters and how to construct my scenes
I have used music to enhance the emotions in a scene in my novel. however, copyright can be an issue if you have excerpts of songs from different bands, even if you acknowledge them or use just a line or two.
I listen to classical music to enhance my mood. I do not use music to create images of my characters.
I decided on my characters and their functions when I outlined my novel. I do not write a two to three page synopsis on each character like Malorie Blackman. I write down one word beside a characters name that defines their uniqueness.