I just tried to have a "verbal" thought while imagining music playing and it's surprisingly impossible! The only way to have any "verbal" thoughts while playing

I just tried to have a "verbal" thought while imagining music playing and it's surprisingly impossible! The only way to have any "verbal" thoughts while playing music in my head is to imagine myself singing it to the melody, or by moving a body part, say a finger, to the imaginary music. The latter feels like delegating the music to the finger, freeing up my brain to think other thoughts. This is far stranger than I ever imagined, and it also might explain why I'm able to fall asleep much faster if I just try to imagine music playing and suppress the urge to tap along with my feet.