On Fri, Jul 13, 2012 at 11:05:02AM +0200, Funs Seelen wrote: > On Thu, Jul 12, 2012 at 7:21 PM, Rustom Mody <rustompmody@xxxxxxxxx> wrote: > > > > > The pythagorean comma is (by definition??) the gap between B# and C where > > by B# means the 12th in a circle of perfect fifths starting at C. > > > > > I would say "a possible gap". It depends on the used temperament, in this > case Pythagorean (perfect fifth: 3/2). For example mean tone temperament > doesn't care that much about fifths and uses 5/4 for major thirds. > ... Writing B#, E#, Fb, Cb or using double accidentals is first of all a matter of consistent notation. A normal major or minor scale should have all of A..G (ignoring # and b) in it and not repeat one of them. That way the character (and the position of a note on a staff) corresponds one-to-one to the note's position in the scale. For example the last three notes of F# Maj. are written as D# E# F# and not D# F F# Now if the actual frequencies of E# and F need to be different depends on the temperament. If they need to, and the instrument doesn't have a separate key for E#, that just means you can't use the F# Maj. scale with the given temperament. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
