This is why a better acronym for IDM is Information Dense Music, it's less pretentious and it explains why it's very close to noise ;)
Of course, I'd argue Bach and Debussy are very information-dense too but they somehow manage to stay uncluttered. The really great thing about music is that encodes information on many different levels, Claude Shannon notwithstanding
In information theory we have:
A message has maximal information content if (and only if) its symbols are statistically indistinguishable from random noise.
Noise or noise-like elements are also important part of many kinds of music.