I hope this will help, something I found out, and some of my own thoughts...
I read something a while back in a magazine about how music is processed in the brain...
The brain is split into two hemispheres, each of which has different roles whilst working together...
One hemisphere, the right, is where the main audio processing center is, this is primarily designed to 'listen' to speech, and as such it responds to rhythm and tone, the same elements as music is constructed from.
This part of the brain is the same part that responds to music and explains in some way why simple 'pop' music is so popular, the use of simple rhythms and melodies with a vocal works well on these areas.
The left hemisphere deals more with logic and objective relations and does not normally respond strongly to audio signals. Brain scans have, however, shown that in musical people (people who play or have a great love of music), and especially in composers this left hand side is acyivated. The result of this is that
the placement and relation in time and tone of the notes is also analysed by the brain.
I've just found a link which may be useful...
link
I'd say that minimal music (of any kind) takes this idea to its conclusion. To normal ears the music seems simple and uninteresting, but to the more educated musical ear the delicate subtleties of the music come through.
Music is an art. All art is the communincation of ideas and emotions through the medium in which it is presented, whether it be sculpture or sound.
With minimal music the concept is to get across this idea or emotion in a way that the structure of the music and the way the sounds relate to each other, and themselves, become as or more important than any melodic element.
For minimal music the listener cannot simply sit back and listen passively, they must bring something to the music themselves.
Man, I love minimalism, even though this is a maximal post