As far as a “Moderate degree of artistic talent” do you mean people that really aren’t that good can create, compose and play something that will become "Popular"? If so that would be interested. If I’m understanding that correctly that would mean that making music that is “Pleasing to the ear” isn’t all that difficult to do. If that is in fact the case then you likely wouldn’t find much of a connection between “Intelligence” and “Music popularity”.
I guess I was under the assumption that people could inherently pick out “Good music”, I.E. complex, well played, intriguing, etc music from the opposite of that.
I also suspect there may be a “Breaking point”. People don’t want to listen to “Bad music”, but sometimes a song that is not all that complex, but “Strikes a chord” with the audience can become very popular.
~Matt
^This. I’ve played guitar and saxophone for 13 years, and minored in music in college. What it boils down to is, there are certain chord progressions that almost always sound good, from Bach to Adele. I can’t get Youtube at work, but watch this: http://www.huffingtonpost.com/2010/04/19/the-only-four-chords-need_n_543025.html
People are amazed that I can hear a song on the radio, then play it instantly on a guitar. That’s because ~75% of popular, radio-friendly songs follow one of three or four chord progressions. If you practice your scales, you can play any song, in any key, with almost zero “thinking” involved.
It gets more confusing when you listen to jazz tunes, but they still very much follow time-tested formulas that are pleasing to the ear. The best jazz musicians just find new ways to alter chords and melodies, and can do it on command. That’s why I can play “standard” jazz songs OK, because I have a good ear and a pretty high level of intelligence. But the guys I studied with who mastered their instruments at a higher level – they all have that “brilliance” that you can’t put a finger on, even if my GPA was higher.
So you don’t have to be “smart” to write a pleasing tune. But I would argue that you do have to be savvy, to do it in a way that separates yourself. I haven’t written many songs since I realized this. I’m stuck in a gray area: I know that what I hear on the radio is the musical equivalent of McDonald’s – but I can’t exactly prepare food like the Iron Chef. So instead I settle for Chili’s.