octavation

Transposition by an octave.

OCTAVATION (also called Pitch Control) — Changing the rate of tape speed over the playback head of a tape recorder changes the pitch of the signal being played back. If the speed is doubled, the signal will increase in pitch one octave.

A French rondeau from the Roman de la Rose (12th century) first establishes the triad, then turns to the seventh, but leaves it immediately to catch the octave, only to return in haste to the safer, wonted seventh. A similar example of uncertain octavation will be described in the following section on the Fate of Quartal and Quintal Patterns.

Normalization of a numerical ratio by repeated multiplication or division by 2.

It may be said that the sex question is both brain stem and pelvic stem in its fourfold octavation with its stabilizing governor, the pituitary body. These consist in coördination and correlation, the sex relation of octavation of voice and pitch.

Energy is apparently transmuted by a series of octavations and that these octavations differentiate matter.

The relationship between two planets that are distant from each other by one eighth of a great circle (45.625 degrees)

This octavation will be qualified (and perhaps rendered nil) if on a day when Uranus is well aspected its octave Mercury should be adversely aspected, or vice versa.

Conversion (of the expression of a number) from denary to octal notation.

The inverse operation, which is termed “decimation,” together with an adequate treatment for the octavation of decimal fractions will be mentioned here without consideration of the details.

The author […] supplied elaborate rules for the use of the octave system and for the reducing of numbers from the decade to the octave system, and the reverse — processes which he called octavation and decimation, respectively.