Overview - Chapter 3

Stereo Flanging

In the case of the Stereo Flange, the signal is split into three parts with a dry signal and a separate Delay section for both left and right channels with one channel flanging up while the other channel flanges down. Once again, this causes the effect to become more pronounced and dramatic.

 

 

DRY SIGNAL

 

 

 

 

 

 

 

 

 

 

FEEDBACK

 

 

 

 

LEFT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLANGED

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

DELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DRY

 

 

 

 

LFO

 

 

 

 

 

SIGNAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DELAY

 

 

 

 

RIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FEEDBACK

 

 

 

 

FLANGED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DRY SIGNAL

 

 

 

 

 

Phasor

Another popular effect is the Phasor or Phase Shifter. Although similar to flanging , this effect is produced differently. Again, part of the signal is split from the original signal. The Phasor shifts the phase of different frequencies in different amounts, resulting in a comb filter effect when combined with the dry signal.

 

 

 

LFO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DRY

 

 

PHASOR

 

 

PHASED

 

 

 

 

 

 

 

 

 

 

 

 

SIGNAL

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

DRY SIGNAL

Mono/Stereo Lezlie Cabinet

With the Lezlie type selected, the pitch change Block becomes a rotating speaker simulator. This effect was extremely popular during the 1960Õs and was achieved by mechanically rotating the speakers to produce complex timbral changes. The Lezlie speaker system is most often used with tone wheel organs, but is occasionally used for guitar amplification as well. You have control over the motor (on/off), speed (slow/fast) and high rotor level (-12/+6dB), which controls the brightness of the effect.

The stereo version gives you an additional parameter called Stereo Separation. This gives you control over how ÒwideÓ the stereo signal should appear. There are two different Òrotating speakerÓ simulation types to choose from, circular and linear. ÒCircularÓ uses a complex, elliptical equation for a realistic forward/back depth. The ÒLinearÓ scheme is a simpler panning routine which provides a wider stereo spread. You can select between the two simulation types by setting the Stereo Separation parameter to either a positive or negative value. Experiment with both to find which works better which your music.

Q20 Reference Manual

41