UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &LevelMeter::on_theme_changed));
ColorsChanged.connect (sigc::mem_fun (*this, &LevelMeter::color_handler));
max_peak = minus_infinity();
UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &LevelMeter::on_theme_changed));
ColorsChanged.connect (sigc::mem_fun (*this, &LevelMeter::color_handler));
max_peak = minus_infinity();