A comprehensive dictionary of organ stops - Allen Organ Studio of ...

138 DICTIONARY OF ORGAN STOPS.
Double Rohrflutes with chimneys to the lowest note are exceedingly
rare, nor, indeed, does any material advantage accrue from piercing the
stoppers of such large pipes. A stopped double, with the stoppers of the
upper notes pierced, is sometimes named Rohr-Bordun. M. D£bierre,
of Nantes, however, makes a speciality of compact organs, in which he
produces two or three low notes from one pipe. The author has in his
possession one of these Polyphone Pipes, made by M. Ddbierre. It
was presented to him by his friend, Mr. J. C. Casavant, the celebrated
Canadian organ builder, of St. Hyacinthe, Quebec. The pipe is a closed
one, with the stopper in the usual position at the top. But down the
front of the pipe extends a rectangular wooden chimney, with the end,
reaching nearly down to the mouth, unclosed. This chimney opens, of
course, into the main pipe, at the top. In it are bored two orifices, one
on each side, at set distances apart. The said holes are covered by a
circular pallet or disc, carried on the arm of a motor bellows. The lowest
note of the pipe is that given by the pipe with both of these holes closed.
The next note, a semitone higher, is obtained by admitting wind to the
motor, which uncovers the hole lowest on the side of the chimney. The
highest note, a semitone sharper than the last, is obtained by admitting
wind to the other motor. Thus, to obtain one or other of the alternative
notes, it is only necessary, simultaneously with the admission of wind to
the pipe, to allow it to pass into a channel connected with the interior of
•one of the motors. The pipe is provided with a beard, in the form of a
fender, shading the mouth. Requiring, as it does, mechanism of the
simplest character only, it will be evident that in this device we have a
fruitful source of economy.
Rohr-Gedeckt—See Rohrflote.
Rohr-Nasat—A Twelfth of Rohrflote pipes.
Rohrschelle—(Ger.) Rohr = reed; Schelle = bell. See Hohlschelle.
Roller—See Beard.
Rossignol—(Fr.) = nightingale. See Avicinium.
" Rustic "—This name occurs in some of the specifications given in
Hopkins' and Rimbault's treatise. See Bauerflote.
s.
Sackbut—32 ft.
The name was applied to the 32 ft. reed in the organ at York Minster
{Hill, 1833). Though the first reed stop of that pitch to be introduced
into an English organ, it was not removed until the recent reconstruction
of that instrument (Walker, 1903). The Biblical Sackbut was a variety of
harp of Oriental origin. The derivation of Sackbut is obscure. Webster