Issue 2405 in lilypond: Patch: Fix mordents and pralltriller in articulate.ly

[lilypond]

Status: New
Owner: ----
Labels: Type-Enhancement Patch-new

New issue 2405 by address@hidden: Patch: Fix mordents and  
pralltriller in articulate.ly
http://code.google.com/p/lilypond/issues/detail?id=2405

Fix mordents and pralltriller in articulate.ly

Mordents should be on-beat, not grace notes.  And pralltrillers
(half-shakes) are always either 4 alternating notes, or an inverted
mordent.

There is of course a general problem here in that the way ornaments
are realised has changed through the centuries.  Even Bach and
Clementi disagree! I'm following CPE Bach's `True art of Keyboard
Playing' in the interpretation here.  To do the job properly we'd have
two articulations: \prall and \inverted_mordent and treat them
separately for MIDI, but typeset the same glyph.

Reported-by: Christopher Maden <address@hidden>
Signed-off-by: Peter Chubb <address@hidden>

http://codereview.appspot.com/5784084