Electro-Harmonix Octave Multiplexer Pedal


  • High Filter
    low-pass filter, filtering out the high tones?
  • Bass Filter
    high-pass filter, filtering out the low tones?
  • (Threadle)
    mixes the clean signal with the effected signal


a 70's Electro-Harmonix brochure

Now Synthesize a not one octave below the one you're playing. The Octave Multiplexer literally allows you to convert any standard electric guitar into an electric bass - making possible lightning fast bass runs. An unbelievable extension for horns and trumpets. It explodes the tonal capabilities of these instruments into the range of the bass and baritone horns. Five filters allow the user to shape the harmonic content of the new note from fuzz bass to a pure deep organ bass. The Octave Multiplexer is fantastic on voice too; it makes any singer sound like Ike Turner. The Pedal gives the musician continuous foot-controlled blending of his notes and the octave-synthesized notes, for ultimate flexibility. This allows the playing of guitar/bass duets and answering bass runs.

Most recent forum threads


  • Dimensions
    13" x 6" x 3 3/4"
  • Weight
    4 pounds

Where to find one?

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foot-controlled threadle wah lowpass lopass lo-pass lp lpf low-pass filter filter eq/excite/filter hpf hipass hi-pass highpass hp high-pass filter pitch/octave octavers octave lower octave 1 octave lower 1 octave down octaver frequency
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