On Wed, Dec 23, 2020 at 4:59 PM Carl Sorensen <carl.d.soren...@gmail.com> wrote:
> Freeman, > > On Wed, Dec 23, 2020 at 2:41 PM Freeman Gilmore <freeman.gilm...@gmail.com> > wrote: > >> >> >> On Tue, Dec 22, 2020 at 1:02 PM Mark Stephen Mrotek <carsonm...@ca.rr.com> >> wrote: >> >>> Freeman, >>> >>> >>> >>> *http://lilypond.org/doc/v2.19/Documentation/internals/key_005fengraver >>> <http://lilypond.org/doc/v2.19/Documentation/internals/key_005fengraver>* >>> >> >> *I read through the Key_Engraver, url above, and related KeySignature and >> KeyCancellation.* >> >> * The only details there, which I think I know, is how the pairs are >> constructed in the keyAlterationOrder. And they have it wrong. I >> believe it should read: … step is a number from 0 to 6 and alter from -2 >> (flat) to 2 (sharp)? (Not -2 (sharp) to 2 (flat).) No details are given >> as to how the alist order is read or constructed. I do see The 5th in >> the pairs (step). I know that the alist cannot be read with assoc, at >> least in its simple form. Any suggestions were the details of the >> keyAlterationOrderis explained?* >> > > *That's the best documentation we have. The next place to look is in the > source.* > > > *Line 177 of ly/engraver-init.ly <http://engraver-init.ly> is where > keyAlterationOrder is defined: * > > > *https://gitlab.com/lilypond/lilypond/-/blob/master/ly/engraver-init.ly > <https://gitlab.com/lilypond/lilypond/-/blob/master/ly/engraver-init.ly>* > . When i go here I get a blank page with a menu on the left and nothing opens > > *keyAlterationOrder = #`( > (6 . ,FLAT) (2 . ,FLAT) (5 . ,FLAT ) (1 . ,FLAT) (4 . ,FLAT) (0 . > ,FLAT) (3 . ,FLAT) > (3 . ,SHARP) (0 . ,SHARP) (4 . ,SHARP) (1 . ,SHARP) (5 . ,SHARP) (2 . > ,SHARP) (6 . ,SHARP) > (6 . ,DOUBLE-FLAT) (2 . ,DOUBLE-FLAT) (5 . ,DOUBLE-FLAT ) (1 . > ,DOUBLE-FLAT) (4 . ,DOUBLE-FLAT) (0 . ,DOUBLE-FLAT) (3 . ,DOUBLE-FLAT) > (3 . ,DOUBLE-SHARP) (0 . ,DOUBLE-SHARP) (4 . ,DOUBLE-SHARP) (1 . > ,DOUBLE-SHARP) (5 . ,DOUBLE-SHARP) (2 . ,DOUBLE-SHARP) (6 . ,DOUBLE-SHARP) > )* > > There are 4 sets with the same 7 keys 2 different orders of the keys. There are several out there. Here is one with the same accidental vertical not horizontal: keyAlterationOrder = #`( % Flats: (6 . -6/53) (6 . -12/53) (6 . -18/53) (6 . -24/53) (6 . -36/53) (6 . -30/53) (6 . -42/53) (6 . -48/53) (6 . -54/53) (6 . -60/53) (6 . -66/53) (6 . -72/53) (2 . -6/53) (2 . -12/53) (2 . -18/53) (2 . -24/53) (2 . -36/53) (2 . -30/53) (2 . -42/53) (2 . -48/53) (2 . -54/53) (2 . -60/53) (2 . -66/53) (2 . -72/53) (5 . -6/53) (5 . -12/53) (5 . -18/53) (5 . -24/53) (5 . -36/53) (5 . -30/53) (5 . -42/53) (5 . -48/53) (5 . -54/53) (5 . -60/53) (5 . -66/53) (5 . -72/53) (1 . -6/53) (1 . -12/53) (1 . -18/53) (1 . -24/53) (1 . -36/53) (1 . -30/53) (1 . -42/53) (1 . -48/53) (1 . -54/53) (1 . -60/53) (1 . -66/53) (1 . -72/53) (4 . -6/53) (4 . -12/53) (4 . -18/53) (4 . -24/53) (4 . -36/53) (4 . -30/53) (4 . -42/53) (4 . -48/53) (4 . -54/53) (4 . -60/53) (4 . -66/53) (4 . -72/53) (0 . -6/53) (0 . -12/53) (0 . -18/53) (0 . -24/53) (0 . -36/53) (0 . -30/53) (0 . -42/53) (0 . -48/53) (0 . -54/53) (0 . -60/53) (0 . -66/53) (0 . -72/53) (3 . -6/53) (3 . -12/53) (3 . -18/53) (3 . -24/53) (3 . -36/53) (3 . -30/53) (3 . -42/53) (3 . -48/53) (3 . -54/53) (3 . -60/53) (3 . -66/53) (3 . -72/53) % Sharps: (3 . 6/53) (3 . 12/53) (3 . 18/53) (3 . 24/53) (3 . 30/53) (3 . 36/53) (3 . 42/53) (3 . 48/53) (3 . 54/53) (3 . 60/53) (3 . 66/53) (3 . 72/53) (0 . 6/53) (0 . 12/53) (0 . 18/53) (0 . 24/53) (0 . 30/53) (0 . 36/53) (0 . 42/53) (0 . 48/53) (0 . 54/53) (0 . 60/53) (0 . 66/53) (0 . 72/53) (4 . 6/53) (4 . 12/53) (4 . 18/53) (4 . 24/53) (4 . 30/53) (4 . 36/53) (4 . 42/53) (4 . 48/53) (4 . 54/53) (4 . 60/53) (4 . 66/53) (4 . 72/53) (1 . 6/53) (1 . 12/53) (1 . 18/53) (1 . 24/53) (1 . 30/53) (1 . 36/53) (1 . 42/53) (1 . 48/53) (1 . 54/53) (1 . 60/53) (1 . 66/53) (1 . 72/53) (5 . 6/53) (5 . 12/53) (5 . 18/53) (5 . 24/53) (5 . 30/53) (5 . 36/53) (5 . 42/53) (5 . 48/53) (5 . 54/53) (5 . 60/53) (5 . 66/53) (5 . 72/53) (2 . 6/53) (2 . 12/53) (2 . 18/53) (2 . 24/53) (2 . 30/53) (2 . 36/53) (2 . 42/53) (2 . 48/53) (2 . 54/53) (2 . 60/53) (2 . 66/53) (2 . 72/53) (6 . 6/53) (6 . 12/53) (6 . 18/53) (6 . 24/53) (6 . 30/53) (6 . 36/53) (6 . 42/53) (6 . 48/53) (6 . 54/53) (6 . 60/53) (6 . 66/53) (6 . 72/53) ) So where is the order? 7 key each with 24 pairs. *It appears that the accidentals show up in the list in the relative order > they will appear in a key signature. They are grouped by the kind of > alteration (flats, sharps, double flats, double sharps). So for sharps, > the first to appear in a key signature is f#, followed by c#, followed by > g#, then d#, and so on. For flats, we start with bb, then eb, then ab, and > so on.* > I now the order of 5th and 4th as you explain here. > > *I don't know what other documentation you want.* > Something that explains the way the alist is formed? . Thank you, ƒg > *I hope this helps.* > > *Carl* > >
