145a146
>         self.voice_id = None;
285,287c286,288
<         voice_id = self.get_maybe_exist_named_child ('voice')
<         if voice_id:
<             return voice_id.get_text ()
---
>         voice = self.get_maybe_exist_named_child ('voice')
>         if voice:
>             return voice.get_text ()
289c290
<             return None
---
>             return self.voice_id;
659a661,662
>             voice_id = None;
>             assign_to_next_voice = []
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>                 # assign a voice to all measure elements
>                 if (n.get_name() == 'backup'):
>                     voice_id = None;
> 
>                 if isinstance(n, Measure_element):
>                     if n.get_voice_id ():
>                         voice_id = n.get_voice_id () 
>                         for i in assign_to_next_voice:
>                             i.voice_id = voice_id
>                         assign_to_next_voice = []
>                     else:
>                         if voice_id:
>                             n.voice_id = voice_id
>                         else:
>                             assign_to_next_voice.append (n)
> 
865,869c884,885
<                 staff_id = n.get_maybe_exist_named_child (u'staff')
<                 if staff_id:
<                     staff_id = staff_id.get_text ()
<                 if staff_id:
<                     dir_voices = staff_to_voice_dict.get (staff_id, voices.keys ())
---
>                 if (n.voice_id):
>                     voices[n.voice_id].add_element (n)
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<                     dir_voices = voices.keys ()
<                 for v in dir_voices:
<                     voices[v].add_element (n)
---
>                     assign_to_next_note.append (n)
1072c1086
< class Direction (Music_xml_node):
---
> class Direction (Measure_element):