--- /dev/null
+#ifndef __ardour_route_group_specialized_h__
+#define __ardour_route_group_specialized_h__
+
+#include <ardour/route_group.h>
+#include <ardour/audio_track.h>
+
+namespace ARDOUR {
+
+template<class T> void
+RouteGroup::apply (void (AudioTrack::*func)(T, void *), T val, void *src)
+{
+ for (list<Route *>::iterator i = routes.begin(); i != routes.end(); i++) {
+ AudioTrack *at;
+ if ((at = dynamic_cast<AudioTrack*>(*i)) != 0) {
+ (at->*func)(val, this);
+ }
+ }
+}
+
+} /* namespace ARDOUR */
+
+#endif /* __ardour_route_group_specialized_h__ */