boost::shared_ptr<Amp> amp() const { return _amp; }
boost::shared_ptr<PeakMeter> meter() const { return _meter; }
bool metering() const { return _metering; }
void set_metering (bool yn) { _metering = yn; }
boost::shared_ptr<Amp> amp() const { return _amp; }
boost::shared_ptr<PeakMeter> meter() const { return _meter; }
bool metering() const { return _metering; }
void set_metering (bool yn) { _metering = yn; }