boost::shared_ptr<ARDOUR::AudioPlaylist> _audio_playlist;
boost::shared_ptr<ARDOUR::Source> _source;
/** 16 regions, of length 100, each referencing a source which is 4096
- * frames of a staircase waveform.
+ * samples of a staircase waveform.
*/
boost::shared_ptr<ARDOUR::Region> _r[16];
/** AudioRegion downcasts of _r[] */