Rodgers A648, Owner'S Manual

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The term
stop is used to describe a single voice on an organ. Stops are activated by Rocker
Tablets (tabs) and/or Drawknobs . Depending on model, a stop may also be activated by a
piston (i.e. chimes). The stop will sound if it is activated and any keys or pedals that control
that
division are pressed.
2 For a description of stops and their character of sound, refer to Appendix A.
• How to turn on/off a stop
To activate a stop or control, pull the drawknob or press the bottom of the tab, and release. To
deactivate a stop or control, push the drawknob or press the top of the tab, and release.
All stops can be cleared quickly by pressing the General Cancel piston, (labeled
‘ 0 ’) located on the right-hand side under the bottom keyboard. Simply press and
release this piston to cancel a registration.
2 Many stops have more than one voice to choose from. This is referred to as the
Rodgers Voice Palette™. See the AG (Advanced User’s Guide)
•
Tremulants
If your organ has no stops on but you turn on a Tremulant and play a key, you will hear nothing.
Tremulants create a “wavy” sound to organ stops already turned on. Actually, tremulants
change the pitch (sharp and flat), amplitude (volume) and timbre (tone quality). The use of the
tremulant adds warmth and expressiveness to solo or small ensemble combinations. It is not
common to use tremulants in larger classical ensembles. In some romantic ensembles,
tremulants are used judiciously. In some gospel and evangelical musical traditions, tremulants
with a wider and deeper excursion are frequently used.
There are two types of tremulant controls.
Divisional tremulants affect only the stops in their
respective division. Divisional tremulants are drawknobs or tabs located among the stops per
division, labeled TREMULANT or they may be thumb pistons labeled SW TREM, GT TREM, CH
TREM, etc.
General tremulants affect all divisions. General tremulants usually are thumb
pistons labeled FLUTE TREM II, MAIN TREM II, FLUTE TREM ALT, or MAIN TREM ALT.
Couplers
If your organ has no stops on but you turn on a coupler and play a key, you will hear nothing. A
Coupler is a control which allows stops from a division of the organ to be played on a different
manual. For example, by activating the Swell to Great coupler, you could play stops in the