Music in the Mind
Have you ever heard a song playing in your head of its own accord?
Have you ever tried to stop a song from playing in your head when you desired that it not be heard?
This article at the link below may in part explain why?
Realize that ancient yogis did not have to deal with recorded music, radio and video. It is a modern problem for yogis.
The article renders music memory as being positive for dementia patients and perhaps it is, because they want to keep in touch with the mundane social scene. That however may be negative for a yogi.