EarthQuaker Devices Rainbow Machine Polyphonic Pitch Mesmerizer

This one is for experimenters, adventurists, and noisemakers. Totally not for purists and/or tone hounds. There are no “natural sounds” that come from this box. It takes modern DSP and uses it as a tool of future past to create real-time pitch shifting using digital oscillators.

Stop? Okay, fine, but what if I told you the Rainbow Machine has been completely re-imagineered from the pixie dust-covered ground up to be more versatile, twice as loud as the original, with an extended delay time, deeper chorus tones, silent Flexi-Switch™ foot switches on both the Activate and Magic functions, and most of all, has more Magic?

The Rainbow Machine is built around a DSP pitch warping engine that’s designed to be slightly imperfect; colored with digital remnants of the cosmic dust we’ve picked up across the multiverse. That is to say it’s a cold digital beast made to pretend it has feelings.

The Pitch control adjusts the frequency of the polyphonic pitch-warped harmony from a fourth below your input, to a third above, and every atonal pitch in-between. Noon is the unison position. Use the Primary function control to adjust the volume of the polyphonic harmony.

You may add in an accompanying octave or thicken the modulation by bringing up the Secondary function control. The Tracking control adjusts the lag time between the wet and dry signals, and the Tone control rolls off some treble for a darker, “vintage” sound. Clockwise is bright, counterclockwise is dark.

[Pro Tip: The Rainbow Machine’s pitch warping behavior is entirely dependent upon the Pitch knob’s position relative to noon. Set above noon, echoes, pixie trails, and other effects will ascend in pitch as they sustain. With the Pitch control below noon, any lingering effects will descend in pitch. This becomes extremely important when using the Magic function.]

The Secondary control adds an octave of the Primary harmony. When the Pitch control is above noon, Secondary adds an octave above the harmony. When the Pitch control is below noon, the Secondary control will add one octave below the harmony. With the Pitch set to noon, the Secondary control adds an additional chorus voice for modulated, triple-tracked tones. Use this control to blend in faux-shimmer sounds or a low-frequency rumble. It’s up to you. From there, it’s only a matter of how weird you wanna get.

And you can choose how weird you wanna get with the Magic control. This is a regeneration control that creates aliasing (among other things) by feeding the Primary and Secondary signals back on themselves and each other, and a bunch of other stuff no one understands.

With the Magic engaged and the control set low, you can squeeze a few extra repeats out of whatever setting you happen to be using. As you increase the Magic control, you’ll start noticing increased ambiance, resonant, edge-of-oscillation pitch-shifting delays, chorus, metallic digi-flanging, ascending (or descending) pixie trails, controllable self-oscillation, squalls of synthetic noise, whale song, and finally, distortion. It’ll take you way beyond and open up your third eye, trust us. In conjunction with the Tracking control, the Magic creates wild pitch take offs and descends, chaos chorusing, shrieks, groans, gurgles, briggles, bruggles, bridals, wizard-blessed wizardry, signal transformation, imminent destruction, and other general mayhem.

Each and every Rainbow Machine is harvested by hand in the (pixie) dusty Rainbonium mines of sunshiny Akron, Ohio, USA."

Controls

Pitch: This controls the pitch of the harmony. All the way counterclockwise is a 4th down, all the way clockwise is a 3rd up. The middle position is unison. The pitch can be controlled by an expression pedal as well.

Primary: This controls the volume of the Primary pitch-shifted signal. Unity gain is at about 2 o’clock, anything above will boost the signal.

Secondary: This controls the volume of the secondary pitch-shifted signal. The Secondary controls the octave up/down from the primary pitch. At the noon position the Secondary is not present at all. However, turning the knob counterclockwise from noon yields an octave below, whereas turning clockwise yields an octave above and everything in between. Unity gain is at about 2 o’clock, anything above will boost the signal.

Tracking: This controls the amount of lag time between the 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 the more it is reduced. This function is especially useful when the “Magic” is engaged.

Magic: This adjusts the “weirdness” of the effect. The end result is a wide variety of wild effects depending on where the other controls are set. The magic control will only work if the magic switch is engaged 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, turn counterclockwise to soften the highs.

Exp Jack: This is an expression pedal control jack for the pitch. The Pitch control is defeated when an expression pedal is inserted.

Flexi-Switching

This device features Flexi-Switch™ Technology on the Activate and Magic switches! This relay-based, true bypass switching style allows you to simultaneously use momentary and latching style switching.

• For standard latching operation, tap the foot switch once to activate the effect and then tap again to bypass.
• For momentary operation, hold the foot switch down for as long as you’d like to use the effect. Once you release the switch the effect will be bypassed.

Since the switching is relay based, it requires power to pass signal.

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