_canvas = new ImageCanvas (Duple (256, 256));
_wave_view = new WaveView (_canvas->root(), _audio_region);
_wave_view->set_frames_per_pixel ((double) (44100 / 1000) / 64);
_canvas = new ImageCanvas (Duple (256, 256));
_wave_view = new WaveView (_canvas->root(), _audio_region);
_wave_view->set_frames_per_pixel ((double) (44100 / 1000) / 64);