The Electro Harmonix Deluxe Octave Multiplexer vintage 5-knob version guitar pedal made in the early 80s is by far the best of the two versions. This version seems to track a whole lot better.  Very versatile octave machine with a bass option, on or off.


  • Fuzz: Controls the amount of fuzz
  • Mix: (Sub-Harmonix on 5 knob version)controls the mix of the -1 octave and -2 octaves signals
  • Tone: Controls the tone (bass/treble)
  • Blend: Mixes the clean signal with the effected signal (not on all models)
  • Bass On/Off

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