Paul Gallagher's approach to consonance emphasizes pitch ratios in the small whole numbers — 3:2, 4:3, 5:4. His tuning notes state:  "I typically work with 19 tones to the octave, although I occasionally venture as far as 32.  My primary scale is the 8th through 16th partials of an overtone series with C as the fundamental.  I also work with modal variations of the primary scale built on the 3rd, 5th, 7th and 9th partials of that series."

 

read:  Harmony for Our Time