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DOUBLE-TOUCH PRESET PISTONS
The Deseret 115 has three "Double-Touch" presets and a
"Stoprail OFF" piston, located just below the Swell manual.
Each piston has two contact points.
A light touch adds the
stops controlled by the piston to whatever other stops are
already playing.
Firm pressure cancels other presets and
any voices chosen on the stoprail, leaving only the combi-
nation of voices controlled by that piston.
The "Stoprail OFF" piston allows you to disconnect the
stoprail while. you are playing a numbered preset.
You may
then change voices on the stoprail without affecting the
organ sound and then use this. piston to reconnect the stop-
rail and its new combination of voices, either by itself or
in combination with the preset pistons.
Tremulants are not
affected by the preset pistons.
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