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.
The drawbars in earlier consoles have distinct intensity positions with
silent spots between them. Later consoles are equipped with continuous
contact drawbar s which move smoothly with no interruption in tone.
HARMONIC DRAWBARS FOR THE PEDALS
In the pedals the harmonic resources have been combined into two drawbars
which may be used separately or in combinations. 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.
PEDAL TOE PISTONS - CONCERT MODEL E CONSOLE
Four pedal toe pistons are located to
the left of the expression pedals. Numbers
one and two of these pistons are
pedal presets. The third is a Great-to-Pedal
coupler, which makes the pedals
speak with whatever 8 foot tone is set
up on the Great manual. The left pedal
drawbar may be used with the coupler
to add 16 foot tone. The fourth piston
connects the pedals to the two pedal
drawbars.
Lighted piston indicators are provided on the left side of the console just above
the Swell manual. Each time a toe piston is depressed, the proper indicator is
automatically illuminated so the organist always knows which toe piston is
depressed.
FIGURE 5
5
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