HARMONIC DRAWBARS
Each console has four sets of harmonic drawbars, two for each manual.
Figure 4
shows one group of
harmonic drawbars, by which the organist is enabled to mix the fundamental and any, or all, of eight
different harmonics in various proportions. The third bar from the left controls the fundamental, and
each of the other bars is associated with a separate harmonic. If a drawbar is set all the way in, the
harmonic it represents is not present in the mixture.
Each drawbar may be set in eight different positions by the organist in addition to the silent position.
Each position, as marked on the drawbars, represents a different degree of intensity of the harmonic it
controls. When drawn out to position 1, the harmonic it represents will be present with minimum
intensity; when drawn out to position 2, with greater intensity; and so on up to position 8.
A tone color is logged by noting the numerical position of the various drawbars, For instance, the tone
set up on Figure 4 is known as tone 34 630 5210. After a tone is so logged it may be made available
again by setting the harmonic drawbars to that number.
HARMONIC DRAWBARS FOR THE PEDALS
In the pedals the harmonic resources have been combined into two drawbars which may be used
separately or in combination. When the left drawbar is used, emphasis is given to the lower
harmonics, and similarly the higher harmonics are emphasized when the right drawbar is used.
The pedal drawbars are located between the two sets of manual drawbars.
NORMAL - SOFT VOLUME CONTROL
This control (Fig. 3) is a tilting tablet which supplements the action of the expression pedal. In "soft"
position it reduces the volume of the whole instrument. It is particularly useful when playing in a
small room or when the organist wishes to practice without disturbing others
EXPRESSION OR SWELL PEDAL
The swell pedal, located in the customary position, is operated by the right foot, and with it the
volume of the organ may be controlled over a wide range. It operates on the two manuals and
pedals equally; that is to say, once the manuals and pedals are balanced, they retain their relative
balance over the entire swell pedal range
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