John Chambers wrote: > > Bruce Olson writes: > | I had thought I had the simplest way to figure out sharps and flats > | on the key signature from mode and keynote graphed on a .GIF on > | my website. I was wrong. I found a much simpler way, as shown on a > | new .GIF there, SFMODE2.GIF. Most will probably not need it at all, > | the method is so simple and easy to do. > | > | Number letter notes in the order of sharps on the key signature > | (F=1, C=2, G=3, D=4, A=5, E=6, B=7). If the keynote is sharp add > | 7 (14 for double sharp), and if it's flat subtract 7 (-14 for > | double flat). Subtract mode number (1-lydian, 2-ionian, 3 > | mixolydian, 4-dorian, 5-aeolian, 6-phrygian, and 7- locrian) from > | that note number and you get the number of sharps or flats you > | put on the key signature. If the number is negative it's the > | number of flats, and if it's positive it's the number of sharps. > > This is the scheme that Michael Methfessel used in abc2ps. It works > pretty well for the classical European key signatures. In my abc2ps > clone, I added support for non-Western key signatures, so I had to > half-eliminate this scheme. But it's still there, because it turns > out to be convenient to write some key sigs with a classical mode > modified by one or two accidentals. Thus I often write klezmer tunes > in, say, D freygish as "K:Dphr^F". The code uses the above scheme for > handling the "Dphr" part, giving a signature of -2. It then builds > the list of accidentals from that and appends the ^F to the list. > > I'd guess that this numbering of classical key signatures has been > discovered independently by any number of people. > > To subscribe/unsubscribe, point your browser to: >http://www.tullochgorm.com/lists.html
Thanks John, I'm not too surprised. Reinvention is actually pretty common from what I've seen. Bruce Olson Roots of Folk: Old British Isles popular and folk songs, tunes, broadside ballads at my website <A href="http://www.erols.com/olsonw";> Click </a> To subscribe/unsubscribe, point your browser to: http://www.tullochgorm.com/lists.html
