I think these musical patterns discovered by the brain are multi-dimensional. The music is just a serialization of this multi-dimensional object, possessing various kinds of symmetries at different levels. It's as if a complex model was presented piece by piece, allowing the receiver to reassemble it. When the multi-dimensional structure was recovered, there is a feeling of "musical" pleasure. Every note is integrated with the other notes, has it's place in this structure its significance to us emerges by its relation to the whole structure.
The ability to enjoy music is related to how good the high-dimensional reconstruction is. A listener who has no experience with a genre might not perceive subtle symmetries and higher order patterns, thus, it's just some kind of noise. The more she listens, the more her musical "vocabulary" and ability to perceive these symmetries increase. Developing taste for it is developing ability to represent it fully as it is, a form of integrated information.
"The more she listens" part is likely why we can listen to an album once and dislike it and then on a second, third and fourth listen develop an increasing appreciation for it until it potentially becomes a favorite album. I always found that phenomenon strange, but your comment is an interesting theory for why that happens.
The ability to enjoy music is related to how good the high-dimensional reconstruction is. A listener who has no experience with a genre might not perceive subtle symmetries and higher order patterns, thus, it's just some kind of noise. The more she listens, the more her musical "vocabulary" and ability to perceive these symmetries increase. Developing taste for it is developing ability to represent it fully as it is, a form of integrated information.