Although I write in silence (or with white noise on my headphones) I build playlists of the songs that set my characters in motion in my mind. The hero of my last book REALLY came alive to this one:
I'm Still Here
John Rzeznik
https://www.youtube.com/watch?v=vFLqNqYNBP0&list=RDvFLqNqYNBP0&index=2
@SusannaKearsley I just finished The Vanished Days. I cannot get enough of your writing! I think I've read everything that's available so far. And, I'm the same - I have playlists for my witch character, and a playlist that is kind of like a soundtrack for my stories (STILL trying to get my follow-up finished after all these years - the world and a hard drive crash really derailed me).