This question is based on a previous question I have written on Parenting SE: Does playing classical music for infants and young children make them smarter?
Are these claims actually saying classical music is more intelligence enhancing than other forms of music? If so, is that true?
As a composer, I would find this interesting because I think certainly there are many different kinds of music and it seems very surprising to single out one genre as requiring more intelligence.
For instance, suppose you say Mozart is more sophisticated than the Boss (Bruce Springsteen) and therefore more intelligence-promoting. By that logic, then, Schönberg's music should be better for children than Mozart since Schoenberg is certainly more complex than Mozart (e.g. chromatic vs diatonic scales; polymeter vs single meter). But I would never play Schönberg for my child instead of Mozart because I find Schönberg unnatural to listen to because it is so weird and complex. The point is I think simply saying classical music is more sophisticated or superior isn't a very meaningful distinction and greater clarification should be given about why classical music in particular enhances learning (if in fact that has any basis).
Another way of saying this is, why doesn't music in general enhance it then? Why classical music in particular?