Jack Deville Electronics dark echo Manual

Thank you for choosing the Dark Echo by Jack Deville Electronics.  We strive to bring you quality

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Overview

The Dark Echo is a unique delay/echo effect featuring digital echo processing with an analog signal path

and analog support circuitry.  Four external controls and one internal control are provided for the operator

to tune the effect to their unique preferences.  The control operations are explained below:

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BLEND:

The blend knob allows you to mix in the desired amount of

delayed (wet) signal with your clean (dry) signal.

Full CCW rotation mixes out the wet signal allowing only the dry signal to remain.

Full CW rotation mixes and equal amount of wet signal with the dry signal.

REPEATS:

The repeats knob controls the feedback of the echo circuit.

Full CCW rotation will yield 1 echo.

Full CW rotation will yield a stronger echo signal than the dry signal resulting in

self-oscillation.  The self-oscillation threshold lies at 3 o’clock.

TIME:

  The time control affects the time duration between repeats.

Full CCW rotation yields approximately 50ms between repeats.

Full CW rotation yields approximately 450ms between repeats.

SWAY:

  Sway modulates the time control via a triangle wave.  Rotating the control

changes the frequency and intensity of the modulation simultaneously.

Full CCW rotation eliminates the modulation effect.  At lower settings, the modulation

speed is higher while the intensity is lower.  As the control approaches full CW rotation,

the modulation speed decreases as the intensity increases.