Electro-Harmonix Octave Multiplexer Pedal

More info at http://www.effectsdatabase.com/model/eh/octave/pedal#ixzz2G4AvqgG2

Controls

• 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

Various

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.

Specifications

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