eli5 How do we play songs in our head?

Question

I’m curious:

When you have a song stuck in your head or replay a moment from a song in your head, do we or do we not use our voice box and speech parts of our brains to think the music (like when we speak in our heads to think)?

In: 3

Answer 1

So to ask the next question… how do we make up songs in our head?