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MPX 550
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
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
65 Rot:SlowFast
66 Rot Slow
67 Rot SpeedAdj
68 Rot TapRate1
and
deceleration
69 Rot TapRate2
Program Descriptions
"Adjust"
Tap
(Switch)
–
(Resnce)
–
(Speed)
–
(Balance)
Rate
(Resnce)
Rate
4-9
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