+#include "audio-column.hh"
+#include "audio-item.hh"
+#include "context-def.hh"
+#include "context.hh"
+#include "dispatcher.hh"
+#include "global-context.hh"
+#include "performance.hh"
+#include "midi-stream.hh"
+#include "moment.hh"
+#include "output-def.hh"
+#include "string-convert.hh"
+#include "warn.hh"
+#include "audio-staff.hh"
+#include "audio-item.hh"
+
+ADD_TRANSLATOR_GROUP (Score_performer,
+ /* doc */ "",
+ /* create */ "",
+ /* read */ "",
+ /* write */ "");
+
+Score_performer::Score_performer ()
+{
+ performance_ = 0;
+ skipping_ = false;
+ audio_column_ = 0;
+}
+
+Score_performer::~Score_performer ()
+{
+}
+
+void
+Score_performer::announce_element (Audio_element_info info)
+{
+ announce_infos_.push_back (info);
+ if (Audio_staff *s = dynamic_cast<Audio_staff*> (info.elem_))
+ {
+ performance_->audio_staffs_.push_back (s);
+ }
+
+ performance_->add_element (info.elem_);
+}
+
+void
+Score_performer::acknowledge_audio_elements ()
+{
+ for (vsize i = 0; i < announce_infos_.size (); i++)
+ {
+ if (Audio_item *ai = dynamic_cast<Audio_item *> (announce_infos_[i].elem_))
+ audio_column_->add_audio_item (ai);
+ }
+ Performer_group::acknowledge_audio_elements ();
+}
+
+
+void
+Score_performer::connect_to_context (Context *c)
+{
+ Performer_group::connect_to_context (c);
+
+ Dispatcher *d = c->get_global_context ()->event_source ();
+ d->add_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
+ d->add_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
+ d->add_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
+}
+
+void
+Score_performer::disconnect_from_context ()