Earthquaker Devices Aurelius – Chorus Pedal

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New Tri-Voice Chorus pedal Aurelius by EarthQuaker Devices

This digital unit is modeled after the iconic 1970s CE-1 Chorus Ensemble pedal, but has been meticulously refined to offer a comprehensive chorus and vibrato experience unlike any other. Additionally, EQD have added an expression control feature that enables you to use any TRS expression pedal to adjust the Width, Rate or Balance. Switching to Vibrato Mode, you can create a delicate chorus effect with a smooth vibrato, seamlessly transitioning between the two. But that’s just one of the unit’s many modes, offering endless possibilities for creative sound manipulation.

Aurelius features two distinct operating modes that are differentiated by the color of the Save/Recall switch LED. When in Live Mode, the pedal functions based on the current control settings, and any adjustments made will not affect the saved presets unless explicitly saved. Conversely, in Preset Mode, the saved presets can be selected using the Preset switch, and the physical positions of the controls will be disregarded.

On its own, Aurelius is a noteworthy addition to the EarthQuaker lineup, but what really got our Sweetwater players buzzing was the inclusion of six preset banks. With this feature, it becomes an exceptional deluxe chorus pedal that can be used seamlessly in both live and studio environments. The preset system of Aurelius is straightforward and user-friendly, allowing you to navigate easily between presets on the fly. The LED on the center of the front panel will turn red in preset mode and green in live mode. To switch between modes, you can hold down the footswitch while the pedal is engaged or use the save/recall button to switch between presets and live settings manually.

Earthquaker Devices Aurelius Modes:

The V Mode of the pedal provides a chorus effect that is reminiscent of traditional chorus sounds, but with a pronounced vibrato quality. This is achieved through the use of a triangle LFO that modulates a brief delay line. By turning the Balance control fully clockwise, the dry signal is eliminated, creating a pitch vibrato effect.

In contrast, the C Mode is a blend of chorus and flanger effects that produces a warmer, slower modulation than the V Mode. A sine wave LFO is used to modulate the delay line, and the prominence of each modulation type can be controlled through the Width knob.

Finally, the R Mode is designed to simulate the rotary chorus effect of a Leslie speaker cabinet. This effect combines both amplitude and frequency modulation to create a Doppler effect, similar to the sound produced by the rotating speakers in a Leslie cabinet.

Earthquaker Devices Aurelius Specs:

  • Dimensions: 4.75 x 2.50 x 2.25 in. (121 x 64 x 57 mm) with knobs
  • Current Draw: 75 mA
  • Input Impedance: 500 kΩ
  • Output Impedance: 100 Ω
  • TRS expression pedal wiring:
  • Tip: Wiper
  • Ring: +3.3V
  • Sleeve: Ground

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