Well Temperaments; Selecting A Temperament; Digital Dynamic Wind - Rodgers Trillium T807 Owner's Manual

Well Temperaments

Kirnberger: Johann Philipp Kirnberger (1721-1783) was a German composer and pupil of
Bach from 1739-41. His temperament favored pure fifths, as in the Pythagorean model, but
performance was improved in many keys.
Werckmeister I and III: Andreas Werckmeister experimented with temperaments in the latter
part of the 17th century. In Werckmeister I he further refined the Mean-Tone temperament.
In Werckmeister III, four tones are practically tuned identical to Equal Temperament (C, D#,
F# and A).
Young I and II: Young Temperaments offer further refinements to the Mean-Tone model,
except with slightly higher pitched sharps.
Equal: Equal Temperament is the modern standard which utilizes a succession of 12
semitones of equal size, allowing performance in all keys successfully. The fifths are slightly
narrowed and the upward thirds are considerably sharp, but unlimited modulation from key to
key is possible.

Selecting a Temperament

1. Press and hold the SET piston.
2. Turn the Select knob clockwise (right) until the Pipe Modeling category shows on the
display.
3. Release SET and turn the Select knob until the Temperament menu is visible.
4. Rotate the Alpha dial until the desired temperament appears.
Note: When the organ is turned off, temperament reverts to Equal, the default setting.

Digital Dynamic Wind

Part of the personality of an individual pipe organ relates to the steadiness of the wind supply to
the pipes. Because air is an elastic medium, there is some amount of give in the wind supply of
every pipe instrument. Some organs exhibit more unsteadiness than others according to the type
of wind regulators used (single or multiple reservoirs, schwimmer regulators, etc.). A small
amount of unsteadiness in the wind helps the listener to identify the sound as that of a wind-
blown instrument, although too much can be distracting. Certain types of music, though, seem to
gain charm from a less-than-perfect wind system.
Another characteristic of pipe organs involves changes in pitch that occur in individual pipes
when playing large numbers of pipes together. These pitch changes are due both to variations in
wind pressure as the wind demand becomes greater and to the influence of the sound from
neighboring pipes. This latter effect is greatest upon large-scale flute voices and least upon
P i p e M o d e l i n g
T e m p e r a m e n t
E Q U A L
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