The Tube Distortion effect pedal compresses or clips the audio signal adding sustain and overtones, giving a richer sound. The Tube can be cranked to achieve mega loud dirty industrial hardcore grunge or can be used more conservatively by adding subtle overdrive, giving warmth and thickness to the original signal.
drive - Allows adjustment of the how much distortion is applied to the original signal.
blend - Changes the character of the distortion.
gain - Output volume.