Full Idea
Aesthetic enjoyment seems to be a blend of pleasure with insight into the nature of the object that inspires it.
Gist of Idea
Aesthetic enjoyment combines pleasure with insight
Source
W. David Ross (The Right and the Good [1930], §V)
Book Reference
Ross,W.David: 'The Right and the Good' [OUP 1930], p.141
A Reaction
This is persuasive. Concentration seems required for aesthetic pleasure. It probably enhances sensual pleasure, but it doesn't seem essential. Some literature only gives the illusion of insight, and there is no real insight in listening to music.