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TUNING CONTROL
The 690 is equipped with a TUNING control. This allows the entire organ to be tuned easily
and quickly to a piano or musical instrument not at standard concert pitch (A 440).
If the TUNING
control is pushed in, the organ will remain at standard concert pitch, and turning the control will
have no effect. To alter the pitch, pull the TUNING control out until it clicks, then turn the control
to set the pitch.
CHORUS CONTROL
The 690 features a CHORUS function, which allows the Swell Division to be detuned from the
Great Division, providing even greater "warmth" to the tonal character of the organ. To select the
CHORUS function, press the CHORUS piston. To change the amount of detuning, hold the SET
piston and press the CHORUS piston. The CHORUS piston will begin to flash. By using the
TUNING CONTROL, the CHORUS setting may be adjusted.
TRANSPOSER CONTROL
Turning the TRANSPOSER control will raise or lower the pitch of the organ up to four semi-
tones (half steps). Many singers need a key change to accommodate their voice range, The
TRANSPOSER is especially useful for accompanying soloists, eliminating the need to
me~tally
transpose music on a printed sheet into a more suitable key
..
The TRANS POSER helps the organist
accomplish this effortlessly.
ANTIPHONAL ON/MAIN OFF
The 690 is prepared with ANTIPHONAL ON/MAIN OFF pistons which can operate an
additional stereo audio system. An antiphonal speaker system is usually installed at the opposite
end of the building from the main organ, allowing greater musical flexibility. The ANTIPHONAL
ON piston activates this additional audio system, and the MAIN OFF piston turns off the main
organ. (Note: If the MAIN OFF piston is lighted, the ANTIPHONAL ON piston must be lighted
also, or the organ will not sound through either system.)
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