18
C o n s o l e
M A S T E R T U N I N G
L o c k e d A = 4 4 0
4.
Rotate the Alpha dial until the display shows Adjustable or Manual Only.
Note: The difference between the Adjustable and Manual Only master tuning settings is that in
the Adjustable setting, pitch can be adjusted at the console as described below, or via an
externally connected MIDI device. In the Manual Only setting, pitch can be adjusted only from
the console (described below).
5.
Press Cancel to implement the change and exit the Console menu.
Note: The Console Display reads TRANSPOSER 0 TUNING A=440.0 (default setting) when the
Master Tuning is unlocked.
Adjusting Pitch
1.
Unlock Master Tuning (see Locking and Unlocking Master Tuning above).
2.
Rotate the Alpha dial to adjust the tuning.
Note: When the organ is turned off, tuning reverts to the default setting (A=440.0).
Temperaments
In recent years, there has been a renewed interest in authentic interpretation of organ literature
written before the adoption of Equal Temperament tuning. Until the middle of the 18th century,
the relative pitches of the notes of the scale were chosen to favor music written in key signatures
with few sharps or flats; more remote keys produced varying degrees of aural distress. Many
composers of the day utilized moderately out of tune intervals to evoke momentary tension to the
listener. With the adoption of the Equal Temperament (Well-Tempered) tuning system, almost
universal today, all keys became equally out of tune, and the intentions of these earlier
composers were lost, to some degree.
The Rodgers T837 offers a choice of eight temperaments: Equal, Mean-Tone, Kirnberger,
Werckmeister I, Werckmeister III, Young I, Young II and Pythagorean. This selection of
temperaments allows the organist to hear these historical works as their composers heard them,
or to explore the application of unequal temperament to new music.
Ancient Temperaments
Pythagorean: Pythagoras (582-500 B.C.) was a brilliant Greek theorist and mathematician. The
Pythagorean temperament is characterized by pure fifths and fourths. The Pythagorean theory
founded a diatonic scale which served as a model throughout the Middle Ages.
Mean-Tone: Mean-Tone temperament improves on the Pythagorean tuning by slightly
contracting each of the four fifths needed to generate a major third. Major thirds and in-tune
fifths are slightly narrow, and the differences between the major and minor seconds are
