User manual

4REA4 Controller Software User Guide

V1.30

Chorus - Chorus derives from the late 80’s where different stereo field creation techniques influenced the

sound of each chorusing unit.

Chorus recreates the classics using 3 stereo-field emulations. These emulations can be switched in any

combination creating many different stereo fields. All switches up gives no stereo enhancement.

The traditional Rate and Depth controls cover the centre panel. The LFO driving the modulator can be

switched to sine or rectified shape. The auto-panning section pans the chorus voices giving stereo level

shimmer, another classic modulator effect.

The module is stereo in, stereo out (with software normalised mono input if the source is mono).

Stereo Field emulations - All switches up turns all stereo enhancement off. There are 3 stereo field

emulations each active with switch down. These create stereo fields from a mono input. The 3 emulation

switches can be used in conjunction with each other creating many different stereo field sounds, just like a

number of classic chorus effects. Be careful as all 3 selected together can sound muffled rather than more

‘stereo’ with certain programme.

LFO Split uses two separate LFO’s for left and right, creating a rich stereo image that varies with rate.

Wide pushes the left and right voices apart producing a very wide stereo image, but can sound phasey on

some programme.

MultiVoice stereo field is created through multi-voice splits across left and right. It typically produces a thick

stereo sound, but can sound muffled on some programme.

Rate - Min position for slow speed, best used with high depth settings for slow, deep chorus. Mid position for

medium speed. Use with mid depth for classic chorus sounds. Max position for fast speed. Use with low

depth settings for lively chorus.

Depth - Min position for small voice pitch variation. Useful with fast rates. Max position for large voice pitch

variation. Can cause audible pitch change. Best with slow rate.

Sine/Rectified - modulator Switches between sine wave and rectified LFO modulator.

Autopan - Automatically pans the chorus voices (wet signal only, not the dry signal). This is level modulation

of the wet effect (not the dry signal) across the stereo field. It is not complete signal auto panning.

Pan Depth - Determines the amount of movement across the stereo field. Use higher settings for a stronger

effect.

Speed - Determines the speed of movement across the stereo field.

Gated Verb - An accurate emulation of the classic 80’s Gated Reverb plus two other variants called

‘Panned’ and ‘Powerbox’. The user interface gives instant access to Lo-cut Hi-cut decay spectrum filters and

the gate envelope controls - predelay, attack, hold and release.

We depart from the 80’s and provide a visual representation of the gate time domain envelope helping the

engineer ‘see the time envelope of the gate’. Also included are mono, stereo and wide imaging options and

decay diffusion control.

Lo cut Decay Filter - 20Hz – 6kHz, 24dB/octave Hi Pass Filter to control the decay spectrum.

Hi cut Decay Filter - 400Hz – 20kHz, 12dB/octave Low Pass Filter to control the decay spectrum.

Time domain Gate envelope controls:

Predelay - 0 - 170ms adjustable pre-delay of gate opening (prior to attack starting).