add Sidechain change handler for automatically added initial SC ports

diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 36d1791f9f22afff3787be34ff37eb1421702aa3..4b14d761ebde62cbd167d54c27376b772bb8f418 100644 (file)
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -1014,6 +1014,10 @@ Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor>
                                }
                        }
 
+                       if (pi && pi->has_sidechain ()) {
+                               pi->sidechain_input ()->changed.connect_same_thread (*this, boost::bind (&Route::sidechain_change_handler, this, _1, _2));
+                       }
+
                        if ((*i)->active()) {
                                // why?  emit  ActiveChanged() ??
                                (*i)->activate ();