The Aqueduct is a vintage-inspired pitch vibrato with eight distinct modulation modes, capable of everything from a gentle, amp-like wobble to synth-like sonar pulses and swirling, near-chorus textures.
Key Features
- Eight LFO waveshape and envelope combinations, from classic sine-wave vibrato to synth-style pulses and pseudo-flange textures
- Flexi-Switch footswitch: standard latching or momentary operation, selectable on the fly
- Envelope-controlled pitch mode adds wet/dry blend, opening up chorus and flanger-adjacent sounds alongside vibrato-arm-style pitch bends
- Rate control adjusts LFO speed; Depth controls modulation intensity
- 9V DC centre negative, approx 68mA current draw
Vibrato, and a Lot More Than Vibrato
True vibrato is pitch modulation, not to be confused with tremolo’s volume modulation — and the Aqueduct covers a wide range within that definition. Sine mode gives you the smoothest, most classic amp-style vibrato. Triangle sharpens the pitch bend at the peak of each cycle for something more pronounced. Ramp adds a sonar-pulse character with a synth-like sustain and release. From there, the remaining modes push into rolling wobbles, rapid trills, and one particularly interesting envelope-controlled pitch mode that adds a wet/dry blend control, letting the effect behave more like a chorus or flanger with vibrato-arm-style pitch bends layered in.
Controls
- Rate: sets the LFO speed, controlling how quickly the pitch rises and falls
- Depth: sets the LFO amplitude, adjusting the intensity of the vibrato effect
- Mode (rotary): selects between eight LFO waveshape and envelope combinations
- Flexi-Switch footswitch: tap for standard latching on/off; hold for momentary operation, releasing to bypass
Power
Runs on a standard 9V DC centre-negative supply and draws approximately 68mA. A CIOKS SOL powers it comfortably alongside the rest of your board.
Who Is This For
Worth a look if you want more than a single vintage vibrato voice — the eight modes and Flexi-Switch give you real range, from subtle amp-like wobble through to synth-adjacent and shoegaze-style swirling textures, particularly via the envelope-controlled pitch mode.
Watch It In Action
What does the EarthQuaker Devices Aqueduct do?
It’s a vintage-inspired pitch vibrato with eight modulation modes, ranging from classic amp-style vibrato to synth-like pulses and swirling, chorus-adjacent textures.
What power supply does the Aqueduct need?
A standard 9V DC centre-negative supply. A CIOKS SOL powers it comfortably alongside the rest of your board.
Is the Aqueduct true bypass or buffered?
We’re confirming this detail and will update this answer shortly.
What’s the difference between the eight modes?
Sine gives the smoothest, most classic amp-style vibrato. Triangle has a sharper pitch bend at the peak of each cycle. Ramp adds a synth-like sustain and release. The remaining five modes push further into envelope-controlled and pseudo-flange territory.
Does the Aqueduct support momentary switching?
Yes, via EarthQuaker’s Flexi-Switch. Tap once for standard latching operation, or hold the footswitch down for momentary use, releasing to bypass.
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