Christian Mondrup wrote
I've re-typeset the accompanying music examples with MUP 1. because PMX currently hardly will let me do it ...
?!?!
Please see the appended PMX source, which has both PMX 2.413 default positioning and PMX's approximation of Read's rules for this example. The latter set is implemented by using "Ao" on every main note. "Ao" causes accidentals to be placed in the order that the chord notes are entered. In the Read examples, I didn't do any other tweaking at all.
I'm happy to apologize for my provocative statement on what PMX won't let me do:-) On the other hand that statement indicates that it sometimes pays to be provocative. Now at least humble me understand the power of the PMX "Ao" accidental directive.
So while the order of placement is the same, there are still a few differences between PMX's approximation of Read's rules and Christian's post, especially when Read goes for the vertical stacking on the closest pair while PMX may push one of the two further to the right in cases where some noteheads are left-shifted.
Aside from that, the main differences appear to be 1. Shorter 3-accidental cases where Read goes top-bottom-middle and PMX cascades down; 2. PMX's initial placement of a single accidental is closer to the notehead (but that's the MusiXTeX default, folks).
my MUP typeset initial accidental distances don't (always) reflect those found in Read's book
All in all there are many cases where PMX left alone does get Read's result, and frankly in bar 9 I like PMX's choice better. However, I would be willing to implement a special rule for 3-accidental cases (and make it the default), if people agree. That would be fairly straightforward; but the rest would take a huge amount of trial and error to generalize.
BTW, it looks like Read's book in paperback can be had for as little as $10.00 (used) from Amazon.com.
-- Christian Mondrup, Computer Programmer Scandiatransplant, Skejby Hospital, University Hospital of Aarhus Brendstrupgaardsvej, DK 8200 Aarhus N, Denmark Phone: +45 89 49 53 01 - http://www.scandiatransplant.org
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