// add_subwindow(freq = new SpectrogramFreq(plugin, x, y));
// y += freq->get_h() + plugin->get_theme()->widget_border;
x = x1;
// add_subwindow(freq = new SpectrogramFreq(plugin, x, y));
// y += freq->get_h() + plugin->get_theme()->widget_border;
x = x1;