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More exotic pitches like nones and septimes are not shown in the diagram. Some of the lengths shown have never been built, and are theoretical lengths.The blue bar is the actual lenght in feet, in red the length in meters To see a full screen version of the images, click the link to an acrobat file.Because of all the differences globally below we present a comparative matrix of known systems.
The yellow printed text refer to European system for designating keys on organ keyboards.
Dean Eckmann, former employee at Fisk Organ Building told me that Fisk uses the system shown in in the last column.
When working on an organ in a big reverberant church, they use "Fisk-speak" to make clear - standing in the nave - what key /note to play.
Shouting loud "Play me a Charlie 2 of the 16' foot", resulted in pressing the c2 key with the 16; stop.
In all cases this refers to a pipe that is open at the top side.
When the top op the pipe is closed (or almost closed) the pitch will go down one octave.
It could be argued that some departments (in particular the pedals) are not based on 8' but on 16' pitch and so on, but we shall also refer to the bottom pedal as CC as it typically pulls down the lowest CC manual key when couplers are in use. Scholes Tenth Edition (OUP, 1970) SBN 19 311306 6 Link to Robert's explanation Tony Newnham also pointed out to me that some English Organ builders have a system not shown in the matrix. Graf = Conrad Graf (1782-1851), Viennese/south german school The normal pitch of a tone is most referred to ‘eight feet’.
The pitch of a piano is the same pitch as an 8 foot pipe.
Een bijzonder Mannborg harmonium met zuigwind en drukwind en orgelpijpen TAXONOMIE Inleiding Taxonomie Taxonomie Praetorius Taxonomie tabel Registernamen Click here for the Dutch edition of this page The reed organ or harmonium shares the keyboard lay out with other instruments.
Ask any pianist or organist to play "Frère Jacques" in C major with only one finger and to name the key to start with. Asking the same to Anglo-Saxon organists can result in hearing five (or even more) different answers. The fact that Anglo-Saxon answers deviate from an European answer is due to the fact that the European system is exact.
Not everyone does understand the relation between pipelength and pitch. Normal pitch is 8 foot, one octave lower is 16 foot, hence double the length.