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476 Chapter 26 EVB3
Note: The Hammond B3 isn’t equipped with a Sustain Pedal. This allows you to make
use of your MIDI master keyboard’s Sustain Pedal as a speed switch.
Rotor Fast Rate
Rotor Fast Rate defines the maximum possible rotor speed (Tremolo). While moving the
slider, the Tremolo rotation speed is displayed in Hertz.
Acc/Dec Scale
The Leslie motors need to physically accelerate and decelerate the speaker horns in the
cabinets, and their power to do so is limited. Acc/Dec Scale determines the speed at
which the motors can accelerate the rotors (time it takes to get the rotors up to a
determined speed), and the length of time it takes for them to slow down. If the slider
is set to its far left position, you can switch to the preset speed immediately. If you drag
the slider to the right, speed changes take more time to occur.
In the default position of 1, which, like any default in Logic, can be set by clicking the
slider while holding Option, the behavior is Leslie-like.
Horn Deflector
If you look inside a Leslie cabinet, you’ll see a double horn, with a deflector at the horn
mouth. This deflector “makes” the Leslie sound. Some people, however, removed it to
alter the Leslie sound, as removal of the deflector increases amplitude modulation, and
decreases frequency modulation. This parameter allows you to switch the deflectors on
and off, without needing to order spare deflectors.
Mic Distance/Mic Angle
The Mic Angle slider defines the stereo image, by changing the angle of the simulated
microphones. An angle of 0° results in a mono sound, while an angle of 180° causes
phase cancellations. Experienced sound engineers tend to avoid wide spreads.
Mic Distance makes the sound darker, and less defined, when set to higher values. This
is typical of microphones, when positioned further from the sound source.
Motor Control
The original Leslie amps have simple AC outlets for connection of the motor plugs.
Modification is easy, you just remove or swap the plugs, for the motors.
Note: With Single Cabinet, the Motor Ctrl setting is irrelevant, because there are no
separate bass and treble rotors in a Single Cabinet.
A “fancy” variation is the inverse mode (Motor Ctrl = inv). If you switch to Tremolo, the
bass compartment rotates with fast speed, while the horn compartment rotates with
slow speed, and vice versa in Chorale mode. In Brake mode, both rotors will stop.
The 910, or “Memphis” mode, stops the bass drum rotation at slow speed, while the
speed of the horn compartment can be switched. This may be desirable, if you’re after a
solid bass sound, but still want treble movement.