ENSONIQ DP/2 Specifications download pdf (Page 86)

Section 2 — Algorithms

70 ENSONIQ DP/4+ Reference Manual

PHASER-DDL

Phaser-DDL combines a phaser with a digital delay. The phaser creates non-harmonically

spaced moving notches in the signal spectrum, whereas a flanger creates harmonic spacing. This

phaser implements a stereo twelve pole phasing network to achieve time delay which is a

function of frequency (i.e., phase delay); this is what differentiates the phaser from the flanger.

The phasing effect is achieved within the phaser topology, so it does not depend upon the

external mix. A delay is included at the left output of the phaser which feeds back into the

phaser (see the diagram). Setting the phaser delay feedback parameter (shown at the knobs) to 00

will disable this delay function. The delay feedback also controls the delay feed forward level of

another tap sent to the right channel. This delay topology achieves a 1.5 second ping-pong effect,

and is very effective as a “poor man’s reverb.”

Phaser - DDL Signal Routing

Phaser Feedback

Control

Right

Phaser

(LFO)

Phaser

(LFO)

Main

Outputs

Left

Delay

Delay Feedback

Control

Delay Feedback

Control

01 — Mix

02 — Volume

See the descriptions under the Mix and Volume Parameters, in the beginning of this section. For

this algorithm we recommend a Mix setting of 99.

03 — Phaser LFO Rate Range: 00 to 99

The LFO is within the phaser network. This parameter controls the rate of modulation of the

phaser poles. The higher the value, the faster the rate. Lower values work best with sustained

signals.

04 — Phaser LFO Width Range: 00 to 99

Controls the width of the notch excursion. For large excursions set this parameter to 99. Doing so

can give a very high “woosh” and a very low “woosh.”

05 — Phaser Center Range: -99 to +99

Controls the phaser pole center. High values raise the nominal spectral location of the “woosh”

sound, while low values lower the “woosh.” The range from high to low is controlled with the

phaser width.

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ENSONIQ DP/2 Specifications Page 86

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