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Chapter 26 EVB3 469
Pitch
Compared to the original B3, the EVB3 offers several parameters to change its pitch
behavior.
Note: The Trans UM, Trans LM and Trans Ped parameters are explained in “Transposition
(Octave Range)” on page 458.
Stretch
The EVB3 is tuned to an equal-tempered scale. As a deviation from this standard
tuning, you can stretch the tuning in the bass and treble ranges, much like acoustic
pianos (especially upright pianos). If you select a value higher than 0 for Upper Stretch,
the pitch of the higher notes will be raised. If you select a value higher than 0 for Lower
Stretch, the pitch of the Lower notes will be lowered.
Note: The tones of clavinets, harpsichords, and pianos have inharmonicities in their
harmonic structure. The frequencies of these overtones (harmonics) are not exact,
whole-number multiples of the base frequency, as Pythagorean theory dictates. They
are only approximate and are, in fact, a little higher. The overtones of lower (tuned)
notes, therefore, are more closely related to the main frequencies of the upper notes.
Due to the lack of strings, this inharmonic relationship is not true of organs. The stretch
feature was included for situations where you may wish to use the EVB3 in an
arrangement alongside an acoustic or digital piano (EVP88 and EVD6 Clavinet). When
arranged in conjunction with an orchestra or synthesizers, the stretched tuning facility
should not be used. Please experiment!
Lower Stretch controls the amount of deviation from the equal-tempered scale in the
bass end of the sound. The higher the value, the further down the low notes are tuned.
At a setting of 0, the EVB3 is tuned to an equal-tempered scale, with each octave below
exactly halving the frequency. Upper Stretch controls the amount of deviation from the
equal-tempered scale in the treble end of the sound. The higher the value, the further
up the high notes are tuned. At a setting of 0, the EVB3 is tuned to an equal-tempered
scale, with each octave up exactly doubling the frequency.
Warmth
Warmth controls the amount of random deviation from an equal-tempered scale. High
values add “life” to organ sounds, but tend to sound a little out of tune.