Here is a vintage 1982 Roger Mayer Electronics Rocket Series Octavia “Autograph Edition” electric guitar octave/effects pedal. This particular example is in excellent all original condition and includes the original instructions, as well as the original box! The Octavia produces a sound that is an octave higher than the note you are presently playing. This doubling effect is accomplished through electronic mirror imaging techniques that are program sensitive and also respond to the feedforward inputs of the player. The electronic circuitry is analogue in design and will react faithfully to all the subtleties and harmonic overtones from the guitar. This particular example works perfectly, although the actual switch has been disconnected so the pedal is always ON when in use.