10.6

Table Of Contents
645Logic Pro Instruments
For more information about the technical aspects of the Hammond B3 and the concepts
behind tonewheel sound generation, see A brief Hammond history and Tonewheel sound
generation.
Logic Pro Vintage B3 Pitch controls
Vintage B3 provides several parameters that change its pitch behavior, adding flexibility
that isn’t possible with the original instrument.
Vintage B3 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). 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. This means
that the overtones of lower (tuned) notes 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 principally included for situations in which you want to use
Vintage B3 in an arrangement alongside a recording of an acoustic piano.
You can also randomly detune the sound using the Warmth parameter, and you can even
use the pitch bend wheel of your keyboard to bend the sound. The latter isn’t true to the
original, but it’s a nice creative option.
Pitch parameters
Upper Stretch slider: Set 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, Vintage B3 is tuned to an equal-tempered scale, with each octave up
exactly doubling the frequency.
Lower Stretch slider: Set the amount of deviation from the equal-tempered scale in the
bass frequencies. The higher the value, the further down the low notes are tuned. At a
setting of 0, Vintage B3 is tuned to an equal-tempered scale, with each octave below
exactly halving the frequency.
Warmth slider: Set the amount of random deviation from an equal-tempered scale.
Note: Use of both Warmth and Stretch may result in a detuned sound, which is similar
to a heavy chorus effect. Set Warmth to 0 if you’re after a purer sound.