+class Relative_octave_music
+{
+public:
+ DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (no_relative_callback, (SCM, SCM));
+};
+
+MAKE_SCHEME_CALLBACK (Relative_octave_music, no_relative_callback, 2)
+SCM
+Relative_octave_music::no_relative_callback (SCM /* music */,
+ SCM pitch)
+{
+ return pitch;
+}