I’ve experienced the same while novel writing. You’re thinking hard about scenes, chapters, and plots, and you just turn something subconscious on. The more you use it, the stronger it becomes. Things you hear and see flow in and connect with what you’re working on.
Today’s Theme Music
How about a little Dirty Mac today? Mitch Mitchell, John Lennon, Keith Richards (on bass!) and Eric Clapton, from The Rolling Stones Rock and Roll Circus, 1968, introduced by a young Mick Jagger. Oh, the hair, the youth, the beat, the playing!