SE-GEQ is the 8 band-Equalizer with Chromatic Tuner. When pushing the Tuner Switch, the SE-GEQ becomes a Pedal Tuner. You can choose True Bypass or Tuner system with Foot Switch. When tuning, the noise is perfectly blocked by Low-Impedance Mute of output. When pull up the Tuner Switch, this becomes a 8 band-Equalizer. You can choose Bypass or Equalizer system with Foot Switch.