EarthQuaker Devices Rainbow Machine Pitch Shifting Harmonizer

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£219.00 (including VAT @ 20%)

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Product Ref: 72700

  • Experimental Pitch Shifting Harmonizer Pedal
  • Uses a Moder DSP for Real Time Pitch Shifting
  • Unique Sound Compared to Other Pitch Shifting Devices
  • 'Magic' Dial Adds Levels of Wild and Chaotic Sounds
  • Compatible with External Expression Pedal for Pitch Control

EarthQuaker Devices Rainbow Machine Pitch Shifting Harmonizer

The EarthQuaker Rainbow Machine is an unnatural and very experimental sounding pitch shifting harmonizer pedal. For those who are looking to digitally create some crazy, weird and magical sounds, look no further. Its unique sound is vastly different from most other modern day pitch shifting devices. Designed to be imperfect while still perfectly tracking ever note and chord without glitching out. Its Magic control lies at the heart of the pedal and is key to producing the weird and wonderful tones the Rainbow Machine has become known for. It's been used by countless studio and touring musicians, and what's even more it can be not only used with guitar, but basically any instrument that can be plugged in! All digital wet signal with an all analog dry signal, true bypass switching and handmade one at a time.

Product Ref: 72700

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Full Description

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The Rainbow Machine takes modern DSP and uses it as a tool of future past to create real time pitch shifting using digital oscillators. It produces basic polyphonic harmonies from a 4th down through a 3rd up and every atonal pitch in between that you could dream of. You can add in an accompanying octave of the harmony by dialing up the Secondary function. You can take the harmonies way beyond and open up a realm of new sonic possibilities by bringing in the Magic. In tandem with the Tracking control, the Magic creates wild pitch take offs and descents, chaotic choruses, shrieks, pixie trails and plethora of other mayhem inducing noises. The pitch can be controlled by an external expression pedal for extra fun!

Bright LED indicators mean you always stay in control even on the darkest of stages, a true bypass, all analog signal path ensures an amazingly pure and natural tone straight from your instrument, and to top it all off the pedal is handmade in Ohio, USA to a supreme level of quality. If you're in search of a crazy, over the top sound creating device, the EarthQuaker Rainbow Machine is the pedal for you.

Also works really well with keyboards, bass, vocals, drum machines and just about anything else you can plug in.


  • Pitch: Controls the pitch of the harmony. Fully anti-clockwise is a 4th down, all the way clockwise is a 3rd up. Middle position is unison. Pitch can be controlled by an external expression pedal.
  • Exp Jack: Expression pedal control jack for the pitch. Pitch control dial becomes void when an expression pedal is used.
  • Primary: Controls the volume of the Primary pitch-shifted signal. Unity gain is at about 2 o’clock, anything above will boost the signal.
  • Secondary: Controls the volume of the secondary pitch-shifted signal. The Secondary controls the octave up/down from the primary pitch. At noon position the Secondary is not present at all. However, turning the dial anti-clockwise from noon provides an octave below, whereas turning clockwise gives an octave above and everything in between. Unity gain is at about 2 o’clock, anything above will boost the signal.
  • Tracking: Controls the amount of lag time between direct dry signal and the shifted wet signal. The pitch-shifted signal will track right on the dry signal when this control is all the way clockwise. It will start to lag behind as it's reduced. This function is especially useful when 'Magic' is engaged.
  • Magic: The heart of the Rainbow Machine. Adjusts the 'weirdness' of the effect. The end result is a wide variety of wild effects depending on how the other controls are set. The magic control will only work if the magic switch is activated and the primary and/or secondary are in use. Technically, it’s a regeneration control that creates aliasing between a mix of the primary and secondary functions feeding back against each other.
  • Tone: All the way clockwise is full signal, anti-clockwise softens the highs.


  • Connections: ¼" input, output and expression pedal connections
  • Power: Requires 9V DC power supply
  • Current Draw: 60 mA
  • Construction: Built by hand in Ohio, USA