EBS OctaBass Blue LabelTHE NEW EBS OCTABASS BLUE LABEL PUSHES THE BOUNDARIES FOR WHAT HAS SEEN AS POSSIBLE WITH AN ANALOG OCTAVE EFFECT. THE QUALITY AND CHARACTER OF THE OCTAVE TONE, AS WELL AS THE PRECISION AND SPEED OF THE TRACKING, IS OUTSTANDING. The EBS OctaBass was the first effect unit ever made by EBS. It is famous for fast and accuratetracking and a fat, natural sound. When you play your instrument, it "tracks" the note you play and produce a sound one octave below