Octave effect

An Octave is an effect unit for electric guitar and electric bass that adds the sound of one or more octaves above or below this tone. Roger Mayer developed the effects unit, which was used for the first time in 1967 by the guitarist Jimi Hendrix. The company Tycobrahe brought the device as Tycobrahe Octavia on the market.

Operation

Higher octaves are achieved analogously mostly through the use of a bridge rectifier or half wave rectifier. Rectification means that the negative half wave of the signal "up" expanded. The newly created signal can be reinterpreted as a DC voltage with a superimposed AC voltage, this has twice the frequency of the original signal.

In a classical analog Octavers for lower octaves a Schmitt trigger converts the sinusoidal tones of the signal into a rectangular signal whose frequency is then halved or quartered with a flip-flop frequency divider. 2:1 split, the effect generates the first sub- Okatve and divided in the ratio 4:1, the second sub- octave.

These methods are simpler than that of a digital pitch shifter, because in this the signal must pass through the read pointer, which takes samples and then set higher or lower; thereby sounding original signal and added octave slightly staggered. With accurate play, however, the added octave sounds almost simultaneously with the original sound with analog Octavern.

Analog Octave are monophonic, that is, it can only single notes, not chords are intervals and octaves. With newer digital devices such as the BOSS OC- 3 or the Electro Harmonix POG Polyphonic game, however, are possible.

Examples of the use of a Octavers

Electric guitar

Jimi Hendrix in 1967 was the first to use an octaver for guitars. In the plays Purple Haze and Fire one developed by Roger Mayer in collaboration with Hendrix prototype was used, which produced an octave above the note played. Jeff Beck and Jack White (eg Seven Nation Army ) are also well-known guitarists who have used octaver.

E- bass

Pino Palladino is a known user of Octavern, such as I'm Gonna Tear Your Playhouse Down by Paul Young. Guy Pratt used an octaver, among others, for the bass solo in Like a Prayer by Madonna and Earth Song by Michael Jackson. At Tony Levin's bass sound to Sledgehammer by Peter Gabriel in addition to a compressor and played with a plectrum fretless bass extremely set an octaver is involved.

Known Devices

  • Roger Mayer Octavia
  • BOSS OC-2
  • BOSS OC-3
  • EBS Octabass
  • POG Electro-Harmonix Polyphonic Octave
Bass guitar Musical tone Analogue electronics Schmitt-Trigger Square wave Boss Corporation Polyphony and monophony in instruments Like a Prayer (song) Dynamic range compression
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