+ _colours.push_back (wxColour (139, 139, 255));
+ _colours.push_back (wxColour ( 0, 139, 255));
+ _colours.push_back (wxColour (255, 139, 139));
+ _colours.push_back (wxColour (255, 139, 0));
+
+ set_analysis (shared_ptr<AudioAnalysis> ());
+
+#if MAX_DCP_AUDIO_CHANNELS != 16