The vast majority of people have an ongoing conversation with themselves, an inner voice, that plays an important role in their daily lives. But between 5-10 per cent of the population do not have the same experience of an inner voice, and they find it more difficult to perform certain verbal memory...
I'm almost the opposite. I can recall a song I know and "listen" to it in my head. However my dreams tend to be like comics. A static image with accompanying sounds or, on a couple of occasions, my dream was like listening to an audio book... This was before audio books were a thing.