R-230, -250, -270
SECTION IV
23
ENSEMBLE REGISTRATIONS
Ensemble registrations involve groups of stops that are played together, usually, but not
always, with both hands on one keyboard. They are characterized by compatibility of tone,
clarity, and occasionally power. Such registrations are used in hymn singing, choir
accompaniments, and much of the contrapuntal organ literature.
Much has been written about ensemble registration. The major points are.
Ensembles are created by combining stops. Two factors to be considered are: tone quality
and pitch. Ensembles begin with a few stops at 8’ pitch and expand “outward” in pitch as
they build up. New pitches are usually added in preference to additional 8’ stops.
Ensembles are generally divided into three groups or “choruses”:
The Principal chorus, the most fully developed, is represented in most divisions of
the organ and at pitches from 16’ (Diapason) to high mixtures. The Principal
chorus is sometimes called the narrow-scale flue chorus, a reference to the
relative thinness of principal pipes in relation to their length.
The Flute chorus is also well represented with a diversity of stops at various
pitches. Generally speaking, the Flute chorus is composed of less harmonically
developed tones, and is smoother and of lesser volume than the Principal chorus.
The Flute chorus is sometimes called the wide-scale flue chorus, owing to the
generally “fatter” look of Flute pipes as compared to Principals.
The Reed chorus includes those reed tones designed to be used in the ensemble
buildup. Not all reed voices are ensemble tones. An Hautbois, for example, is
usually a solo stop. The various Trumpets, Clairons, Posaunes, etc., are ensemble
voices that add brilliance, power, and incisiveness to the sound. If you have
questions as to whether a specific reed is a solo or ensemble stop, refer to the
Description of Stops in Section I.
The Swell Reed chorus of Waldhorn 16’ and French Trumpet 8’ represents an entity
important to French organ music and the full ensemble of the organ. These stops create a
“blaze” of harmonic richness that tops off the Principal and Flute choruses.
Another special ensemble combination important in French music is the Cornet, which was
discussed in the section on solo registration. This combination can be used with the chorus
reeds and mutations to create the “Grand Jeu.” The Cornet is also useful in Romantic
ensembles to add weight and thickness to the sound.
Summary of Contents for Renaissance 230
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