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+ +
+The group attributes can optionally be preceded by mid-measure
+parameter changes.
+This is not used very often, but the most common
+use is to change the
+clef
+in the middle of a measure. There are two
+other parameters that can also be changed here:
+defoct
+and
+release.
+The change is enclosed in double angle brackets.
+After the opening angle bracket is the
+context
+to which the changes applies (score, staff, or voice),
+followed by one or more parameter changes.
+
+1: c; e; <<score clef=bass>> 2g; +bar +
+<< staff clef = tenor ; defoct = 4 >> +
+If you wish to change parameters in more than one context, multiple
+angle-bracketed items can be given:
+
+2-3 2: 2c; <<score release=100>><<staff clef=alto>><<voice defoct=3>> c; +
+If you specify "staff" or "voice" context, the specific staff(s) or voice(s) +to which the changes apply is based on which staff(s) or voice(s) +are being described on the input line. So in the example above, +the clef is changed to alto on staffs 2 and 3, and the defoct is +changed to 3 for voice 2 on both of those staffs. The release change +applies to the entire score. +
+