Allen Organ Company Protégé LD-34 Owner's Manual page 9

These few combinations demonstrate basic techniques of solo registration. In creating registrations
of your own, remember these three simple rules:
1. Seek tonal contrast between solo and accompaniment.
2. Be sure the solo is louder than the accompaniment.
3. Choose a solo whose character is appropriate to the specific piece.
Ensemble registrations involve groups of stops that are played together, usually, but not always, with
both hands on one keyboard.
occasionally power. Such registrations are used in hymn singing, choir accompaniments, and much
of the contrapuntal organ literature.
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.
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.
ENSEMBLE REGISTRATIONS
They are characterized by compatibility of tone, clarity, and
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