MusicXML: Add a way to force a pitch output to be in absolute pitch

Even when we convert in relative pitch mode, some pitches will still
need to be written out in absolute pitch. Examples are the arguments
of \transposition or \transpose...

diff --git a/python/musicexp.py b/python/musicexp.py
index 22cfcdcd53888461e0020fd778ed0eae861b8cf2..e0f3f52c979ab50e5a97e85842af2fbe697bc19c 100644 (file)
--- a/python/musicexp.py
+++ b/python/musicexp.py
@@ -271,6 +271,7 @@ class Pitch:
         self.alteration = 0
         self.step = 0
         self.octave = 0
+        self._force_absolute_pitch = False
         
     def __repr__(self):
         return self.ly_expression()
@@ -340,7 +341,7 @@ class Pitch:
 
     def ly_expression (self):
         str = self.ly_step_expression ()
-        if relative_pitches:
+        if relative_pitches and not self._force_absolute_pitch:
             str += self.relative_pitch ()
         else:
             str += self.absolute_pitch ()