On Sun, Jan 10, 2010 at 10:58 PM, Per Boysen <perboysen@gmail.com> wrote: > 100 percent. 12 notes on an octave means a fourth of an octave > must be 2 notes a.k.a. a minor third. Sorry for that TYPO. Of course I meant "2 notes a.k.a. a minor third". Per