> On 26 Sep 2020, at 19:56, Werner LEMBERG <w...@gnu.org> wrote: > >>>> The notes d♯ to e♭ have different pitches in the staff notation >>>> system, which cannot express E12 enharmonic equivalents, so this >>>> is slur. So it should be a slur that looks like slur. > > I disagree. For all practical purposes in standard classical music, > enharmonic equivalents *do* sound the same. What you are referring to > IMHO is a special case that might be controlled by a flag.
They do not, and the string section, that primarily stands for the pitch reference, trains to slide the pitch appropriately: In the video below, time 10:43, Brett mentions that the E (on the D string) against the open G, the sixth, is a bit lower than against the open A; the pure fourth. This is the syntonic comma 81/80, the difference between the Just Intonation major third 5/4, and the higher Pythagorean major third. https://www.youtube.com/watch?v=dW9t7Nrin_c&t=643 This is for adjusting towards Just Intonation, but it is necessary for enharmonic equivalents too, as the Pythagorean comma is the microtonal amount they use in Turkish music. A melody line will not sound right if not adjusted. >> I can think of special cases: Perhaps the tie and the slur are >> rendered slightly differently, say of different thickness, so in >> Werner's example it should be a tie in style. Somebody might want >> to indicate an E12 enharmonic equivalence, as in your example, even >> though it is not so in the staff notation system, and then it should >> be a tie in style. > > As mentioned above: This might be controlled by a flag. Or maybe a > special “E12_tie_slur” engraver can handle this. You probably think of how to handle it internally, because syntactically one might just write a tie between enharmonic equivalents.
