I'm absolutely the wrong person to explain either, but effectively gamelan is a balinese music genre that uses bitonality. As far as I understand, each gamelan group is tuned differently. Within each group, instruments are tuned in a 'male' and 'female' group, and don't share notes. The notes are chosen based on the desired dissonance between the male and female instruments.
Because its not a form of music that's written down, or very well understood, and on top of all that, completely different from one gamelan orchestra to another, there are a significant group of people who don't think gamelan really is music or based on anything worth analysis in a musical context. Arguably, because once you start to consider it, gamelan challenges almost every aspect of what we consider music. Again, I'm not an expert nor really worthy of making these claims.
Because its not a form of music that's written down, or very well understood, and on top of all that, completely different from one gamelan orchestra to another, there are a significant group of people who don't think gamelan really is music or based on anything worth analysis in a musical context. Arguably, because once you start to consider it, gamelan challenges almost every aspect of what we consider music. Again, I'm not an expert nor really worthy of making these claims.
