}
-upperStaff = \context GregorianStaff = "upperStaff" <<
+upperStaff = \new GregorianStaff = "upperStaff" <<
\context GregorianVoice <<
\set Score.timing = ##f
% \set Score.forceAccidental = ##t %%%%%%%% FIXME: what happened to this property?
>>
>>
-lowerStaff = \context MensuralStaff = "lowerStaff" <<
+lowerStaff = \new MensuralStaff = "lowerStaff" <<
\context MensuralVoice <<
% this is broken until further notice -- see refman