Music gives pleasure because your mind keeps predicting what comes next. Each correct prediction triggers dopamine. You can't make good predictions for unfamiliar music, so you don't get the dopamine. But when music is too familiar, something strange happens. You don't get the dopamine either because your brain predicts it effortlessly. To make you happy, music must be at the sweet spot of novelty and familiarity.
Loretta Graziano Breuning, Habits of a Happy Brain: Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin,  Endorphin Levels
brain, music, psychology