Lexicon MPX 550 manual Rotary Programs Adjust Tap

MPX 550

Program Descriptions

ROTARY

Rotary speaker cabinets were designed to provide a majestic vibrato/choir effect for electronic theater and church organs. The most well-known rotary speaker is the Leslie™ Model 122, which has two counter-rotating elements: a high-frequency horn and a low-frequency drum with slow and fast speeds. The sound generated as the spinning elements change speed is truly magical. The swirling, spacious effect is difficult to describe - but immediately recognizable.

The Rotary programs are a detailed simulation of a Leslie- style cabinet. The input signal is split into high and low-frequency bands. The rotation effect is created by a synchronized combination of pitch shifting, tremolo, and panning. Like the physical cabinet, the high (horn) and low (drum) frequencies are "spun" in opposite directions. Horn and drum speeds are independent, and designed with acceleration and deceleration characteristics to simulate the inertia of the original mechanical elements.

A virtual requirement for organ music, Rotary programs also sound remarkable with guitar and electric piano rhythm parts. In fact, these programs are great alternatives to chorus and tremolo effects for any sound source.

To achieve the full effect, set the Mix parameter to Wet for all programs.

Rotary Programs		"Adjust"	Tap
65	Rot:SlowFast	(Switch)	–
66	Rot Slow	(Resnce)	–
67	Rot SpeedAdj	(Speed)	–
68	Rot TapRate1	(Balance)	Rate
69	Rot TapRate2	(Resnce)	Rate

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