Pull any softer combination of stops and play a passage. Press the Sforzando or Tutti reversible, and repeat the passage. Note that the stops do not appear to change, but electrically (“blindly”) most of the stops of the organ are engaged. Press the reversible again, and you again hear only the stops that you had pulled earlier. (See a video example on next screen.)
Some larger organs are equipped with an alternate Sforzando or Tutti. Pressing this piston (i.e., “Tutti II”) before activating the reversible will result in another type of full-organ combination.
BE SURE to de-activate the Sforzando or Tutti reversible before moving on to another softer piece or passage!
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