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462 Chapter 26 EVB3
Tune
The simulated tone wheel generator can be tuned in cents (percentages of a semitone).
0 c is equal to A = 440 Hz.
Scanner Vibrato
The vibrato of the organ itself must not be confused with the Leslie effect, which is
based on rotating speaker horns. The EVB3 simulates both.
The Scanner Vibrato is based on an analog delay line, consisting of several lowpass
filters. The delay line is scanned by a multipole capacitor, which has a rotating pickup. It
is a unique effect that cannot be simulated with simple LFOs.
Like the Hammond B3, the EVB3 features three types of vibrato—with different
intensities (V1, V2, V3). Vibrato speed is set with the Rate parameter. In the V1, V2, and
V3 positions of the Type parameter, only the signal of delay line is heard.
The C1, C2, and C3 Chorus positions of the Type parameter mix the signal of the delay
line with the original signal. Mixing a vibrato signal with an original, statically-pitched
signal, results in a chorus effect. The Chorus parameter allows you to freely mix the dry
signal with the vibrato signal. The Chorus parameter is only active if one of the chorus
settings is engaged.
If the C0 setting is active, chorus and vibrato are disabled. Note that the treble portion
of the organ is boosted slightly if any vibrato setting is used. This treble boost is
maintained in the C0 setting.
The Upper and Lower buttons allow you to switch the scanner vibrato (and its
associated treble boost) on/off, individually, for the Upper and Lower manual. As the B3
mixes the bass register (Pedal) with the Lower manual, the Pedal register is affected by
the Lower manual’s scanner vibrato settings. This side-effect reflects the technical
limitations of the original B3.