Tie direction for single-stemmed chords

• Aug 30, 2013 - 00:38
open issues

Here is a test suite (produced in 1.3 - Mac 10.7.5) based on some of pages 65 and 66 of 'Behind Bars'.

There is a description on the left and the current result is on the right.



I've taken a look. There are about as many tie-direction standards out there as there are accidental-stacking standards, stem direction standards, or beaming standards. For tie direction, we've fixed the things virtually everything agrees upon: single voice chord have outer ties in opposite directions, notes in multi-voice context have ties on stem side. After that it gets fuzzier.

Looking at the code, I don't really understand our algorithm, but on appearances, it seems to use the middle line as the determinant, with some additional special handling for seconds. Gould mentions using the middle line something done in "some editions" but recommends against it for reasons she does't explain. This is the sort of thing I guess I could see being a style option some day, just as we have settings to control default beaming, but again, it's easy and 100% to flip stems manually if your preferences happen to differ.

I think more research would be needed before I'd think it worthwhile to change the defaults, but FWIW, it's calculated in one place in the code, just a few lines, so it's probably not not difficult.

I would probably recommend producing new scores based on the images from the book.

The way I handled it could introduce unintended influence on the beaming and tie or stem direction.