"... the point where I could see the forest and the trees - where there
was simultaneously Clarity, which comes through a feeling for the
individual elements (the notes), and Density, which comes through a
feeling for the whole (the chord). And I found this balance point to
occur most often when there were not quite three layers of something. I
came to nickname this my 'Law of Two-and-a-half.'"
http://www.ps1.org/cut/volume/murch.html