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

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

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136 DICTIONARY OF ORGAN STOPS. B ' Retreating Reed (Hope-Jones). ' . this ' name Retreating Reed. A variety of reed stop experimentally tried by German builders, and also by Mr. Hope Jones, to whom the above name is due. In the retreating reed the tongue is fixed on the inner side of a frame cor- responding to the ordinary shallot. An experimental model was shown at a lecture delivered in Edinburgh before the Incorporated Society of Musicians. Retusa—See Vox Retusa. Ripieno—(It.) = chorus. Mixture work. An Italian term for Rohr-Bordun—See Rohrflote. Rohrflote- Rohr Gedeckt. (Fr.) Flute-a- Chemine'e. (Eng.) Chimney Flute. Anglice Rohrflute. (Ger.) Rohr = reed. 8 ft.; also 16 ft.; 4 ft. ; rarely 2 ft. The original Rohrflote was a metal pipe, covered at the top with a flat lid, from the centre of which rose a narrow tube or chimney. The similarity of tube to a reed (not organ reed) occasioned the of the stop, which, then, has no connection with any supposed reediness of tone, as some writers have imagined. The tone of the Rohrflote is brighter and less thick than that of a pipe entirely stopped. As made by the old English builders, Snetzler in particular, fashioned of thin metal with wide chimneys and lightly blown, the stop yielded a tone frequently of the most charming character {e.g., St. Andrew, Nottingham ; Snetzler organ rebuilt by Conacher). The pipes were tuned by the highly unsatisfactory method of shading the mouth with long ears (see Bell Gamba). The pipe here illustrated, however, displays ears of ordinary shape, and a sliding "canister" top for tuning purposes. Now-a-days, the metal chimneys are generally dispensed with, and the Rohrflote is, to all intents and purposes, identical with the pierced Lieblich Gedeckt. The chimney is formed by the stopper handle, and the stopper itself, lined with cork, is fitted into the pipe. In this manner the pipes are more easily and rapidly made, and more satisfactorily tuned. The old

DICTIONARY OF ORGAN STOPS. '37 chimneys, also, were liable to be knocked off during tuning operations. The stoppers are usually pierced from about tenor C upwards. Above this note they are made out of a single piece of wood. If the chimneys be carried down to the lowest note, the tone of the bass is apt to acquire a touch of the Quintaton quality. A variety of Rohrflote of large scale and furnished with wide chimneys, was known in Germany as Hohlschelle (g.v.). Of late years the scale of the Rohrflote has been much reduced, both in this country and abroad. In England, indeed, it is not now made of full scale, though still occasionally in Germany. In the latter country, also, doublemouthed Rohrflotes were not unknown. The French Flute-k- Cheminee is a large-scaled Chimney Flute of brilliant and liquid tone (see Flute Couverte). The influence of the chimney on the tone of half-stopped pipes—as those, of the Rohrflote class are termed— presents a problem of great interest. The wider the diameter of the chimney, the more close to that of an open pipe will be the tone. In the " Nova Acta der Kaiserl.-Leop.-Carol. Deutschen- Akademie der Naturforscher " * occurs a very interesting article on the Rohrflote by Dr. R. Gehrhardt. Dr. Gehrhardt's in- vestigations may be summarized as follows :— If, with constant diameter, the chimney be lengthened, the pitch flattens if now the diameter be increased, the pitch will be raised again. Should the stopper be inverted, so that the chimney protrudes into the pipe, the pitch will remain unaltered. The node of an open pipe is practically equivalent to the stopper of a closed pipe. The Rohrflote is partially open and partially closed, and Dr. Gehrhardt found that the vibrations resulting from the two intercommunicatory spaces gave rise to inharmonic upper partials (i.e., overtones not present in the ordinary harmonic series), lying closer to each other and increasing in strength, as the size of the chimney was enlarged. We may therefore regard the Clarinet Flute (q.v.), with its wide chimney,, as owing its peculiar tone in some measure to the presence of these inharmonic upper partials. If a pin-hole be perforated in the lid of a " canister-topped " Gedackt, the pipe will go off its speech, since the rare- faction at the top cannot take place. Various peculiar effects can be obtained by experimenting with half-stopped pipes. The chimneys may be altered in width or length, they may be produced inside as well as outside the pipe, and so on ad infin. (see also Cone Gedackt). 'No. I, Vol. XXII. ; Rohrflote (old form).

136 DICTIONARY OF ORGAN STOPS.<br />

B<br />

' Retreating Reed<br />

(Hope-Jones).<br />

'<br />

. this<br />

' name<br />

Retreating Reed.<br />

A variety <strong>of</strong> reed stop experimentally tried by<br />

German builders, and also by Mr. Hope Jones, to<br />

whom the above name is due. In the retreating reed<br />

the tongue is fixed on the inner side <strong>of</strong> a frame cor-<br />

responding to the ordinary shallot. An experimental<br />

model was shown at a lecture delivered in Edinburgh<br />

before the Incorporated Society <strong>of</strong> Musicians.<br />

Retusa—See Vox Retusa.<br />

Ripieno—(It.) = chorus.<br />

Mixture work.<br />

An Italian term for<br />

Rohr-Bordun—See Rohrflote.<br />

Rohrflote- Rohr Gedeckt. (Fr.) Flute-a-<br />

Chemine'e. (Eng.) Chimney Flute. Anglice<br />

Rohrflute. (Ger.) Rohr = reed. 8 ft.; also<br />

16 ft.; 4 ft. ; rarely 2 ft.<br />

The original Rohrflote was a metal pipe, covered<br />

at the top with a flat lid, from the centre <strong>of</strong> which<br />

rose a narrow tube or chimney. The similarity <strong>of</strong><br />

tube to a reed (not <strong>organ</strong> reed) occasioned the<br />

<strong>of</strong> the stop, which, then, has no connection<br />

with any supposed reediness <strong>of</strong> tone, as some writers<br />

have imagined. The tone <strong>of</strong> the Rohrflote is brighter<br />

and less thick than that <strong>of</strong> a pipe entirely stopped.<br />

As made by the old English builders, Snetzler in<br />

particular, fashioned <strong>of</strong> thin metal with wide chimneys<br />

and lightly blown, the stop yielded a tone frequently<br />

<strong>of</strong> the most charming character {e.g., St. Andrew,<br />

Nottingham ; Snetzler <strong>organ</strong> rebuilt by Conacher).<br />

The pipes were tuned by the highly unsatisfactory<br />

method <strong>of</strong> shading the mouth with long ears (see<br />

Bell Gamba). The pipe here illustrated, however,<br />

displays ears <strong>of</strong> ordinary shape, and a sliding<br />

"canister" top for tuning purposes. Now-a-days, the<br />

metal chimneys are generally dispensed with, and the<br />

Rohrflote is, to all intents and purposes, identical<br />

with the pierced Lieblich Gedeckt. The chimney<br />

is formed by the stopper handle, and the stopper<br />

itself, lined with cork, is fitted into the pipe. In<br />

this manner the pipes are more easily and rapidly<br />

made, and more satisfactorily tuned. The old

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