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2. Turn the Select Knob counter clockwise (left) to “WIND STABILIZER”.
3. Release SET.
4. Rotate the Alpha Dial to select “OFF”, “1/2”, or “ON”.
RANDOM DETUNING
One of the essential ingredients of a pipe organ ensemble arises from the small amount of pitch error
in each pipe. No matter how carefully an instrument is tuned, small changes in temperature or humidity
causes the pipes to drift from their original pitches. Reed pipes are especially prone to drift over time due
to “creeping” of the tuning wire with cyclic temperature variations.
The Random Detuning feature causes selected notes to receive a small amount of detuning. The
amount of detuning is chosen at random for each note of each voice. Some notes will not be detuned at
all. The number of notes detuned and the maximum amount of detuning are selected for each voice to
mimic the behavior of an equivalent pipe set. For instance, reeds will exhibit more pitch error than flues.
Because the detuning is random, there is no degradation of the overall temperament of the instrument and
the amount of detuning is no more than one would experience in a recently-tuned pipe instrument.
This detuning process happens each time the organ is turned on. Once computed, the pitch of each
note remains constant. Thus, the tuning will be a little different, as it would be with a pipe organ, each
time the organ is used. The amount of Random Detuning present in the organ will be set by a Rodgers
representative during final voicing.
EXPRESSION RANGE ADJUSTMENTS
The minimum volume of each division when its Expression Shoe is closed can be adjusted to suit
specific musical needs or personal tastes. The “MINIMUM EXPR:” menu allows three settings—
“NORMAL”, “
ppp”
, and “
pppp”
. The “NORMAL” setting produces the amount of expression obtained
on most pipe instruments with typical swell shades. The “
ppp”
setting produces a greater range than the
“NORMAL” setting, and the “
pppp”
setting produces the amount of expression one might expect from
very heavy and thick swell shades. The settings do not affect the sound at all when the expression shoe is
open.
There are special settings of the Expression Range that can be selected when installing a
pipe/electronic combination organ. When speakers for the enclosed divisions (Swell and Choir) are
placed inside a pipe organ swell box, the digitally sampled electronic stops in those divisions can sound at
a constant volume by setting the Expression Range to “Unenclosed”. Then the expression of those stops,
like the pipes in the swell box, will be controlled by the swell shades.
Setting the Expression Range
1. Press and hold the SET piston.
2. Turn the Select Knob counter clockwise (left) to “ MINIMUM EXPR:”, and place the cursor
over the division name.
3. Rotate the Alpha Dial to select the desired division.
4. Turn the Select Knob clockwise (right). The cursor moves to the bottom line.
