What is this dial on the organ in the Berliner Dom?

I am guessing that the dial may have something to do with air pressure but why would it be needed and what units do the numbers represent?

enter image description here

Here is the performance where the dial is first shown - Warning Loud!"

1 Answer 1


Could be a crescendo indicator dial. It is used to know what is the current position of the crescendo pedal on some organ.

Here Another example. (Image from https://pipeorgandatabase.org/organ/16221)

  • Thanks - that sounds highly likely although I haven't yet been able to confirm online that this particular organ has a crescendo pedal. Feb 12 at 21:33
  • 2
    The Sauer organ in the Berliner Dom has a crescendo pedal. That's the "Registercrescendo" in the "Spielhilfen" listed on the German language page. The Sauer organ has 113 registers. The dial is marked to 104, so I would assume that only 104 of the total registers are connected to the crescendo pedal. The display shows how many of the available registers are selected.
    – JRE
    Feb 13 at 10:56
  • @JRE - Thanks, that's good enough for me! Feb 13 at 12:16

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.