Plurichorus - ehx Polychorus/Echoflanger

Plurichorus Analog Flange/Chorus

The Plurichorus is an analog multi-modulation pedal known for its lush, warmth, complex and often "out-of-this-world" sounds. It uses Bucket Brigade Device (BBD) chips to combines several delay-based effects into one unit. The controls are very interactive with each other in differing ways depending on mode selection:

Description of controls:

KNOBS:

RATE: controls the speed of the modulation effect

WIDTH: controls the depth of the modulation effect

TUNE:

- in FILTER MATRIX mode is used to manually tune to specific flange sounds.

- in FLANGE mode sets the center frequency of the flange.

- in CHORUS mode sets how much slap back delay is introduced into the signal.

- in SLAP BACK mode is used to control the amount of echo.

Note that at WIDTH full up the TUNE control wont have any effect, but will become increasingly active as the WIDTH level is decreased.

FEEDBACK: controls how much effected signal is fed back into the input.

CAUTION: In the extreme CW position the FEEDBACK control may cause oscillation, a squealing or roaring sound. This is normal, and may be stopped by backing off the FEEDBACK control.

4 POSITION ROTARY CONTROL:

FILTER MATRIX - A comb filter, which creates “chime” effects. In this mode you can sweep the TUNE knob manually for “custom” flanging from a high airy tone clockwise (CW) to a rich tone counterclockwise (CCW). The RATE control has no effect in this mode because the LFO sweep of the flange section is disabled. Turning FEEDBACK CW will “sharpen” or increase the intensity of the effect.

FLANGE – A sweeping comb filter which creates a variety of modulation effects and whooshing sounds. The RATE control determines how fast the comb filter sweeps up and down through its pitch range. Turned fully CW, the frequency is about ten cycles per second. Turned fully CCW, the sweep is slow, about one cycle every ten seconds. The pitch range of the sweep is set by the combined action of the WIDTH and TUNE knobs: The TUNE control sets the center frequency, and the WIDTH control determines how far the sweep goes. Maximum TUNE range is obtained by setting the WIDTH knob fully CW. The FEEDBACK knob also operates as in FILTER MATRIX.

CHORUS - A sweeping echo for moving sounds such as “12 string guitar” and rotating speaker effects. When CHORUS mode is selected, the FEEDBACK knob determines the number of echoes: CCW for a single repeat, CW for more. The TUNE control will increase the delay time of the echo as it is turned CW. The WIDTH control maximizes the delay range of the TUNE control in its CW position, and emphasizes the modulating character of the CHORUS effect as it is turned more CW. The RATE control operates as in FLANGE.

SLAP BACK - A short-delay echo for spacious “slapback”. In this mode, all controls operate as in CHORUS mode, except that this is purely an echo effect and the RATE control is disengaged.

BLEND SWITCH: When it is ON from the EFFECT OUT output you will have a mix of wet and dry, when instead it is OFF from the EFFECT OUT output you will have only the effected sound.

EFFECT OUT

is for standard effect usage. For a total spacious stereo effect, connect DIRECT OUT to a second amplifier and turn off the blend switch.

Power: 9V DC center negative