Invariant_(music) Invariant_(music)

Invariant (music) - Definition and Overview

In music using the twelve tone technique invariance describes the portions of rows which have been so designed that they remain invariant under the allowable transformations (inversion, retrograde, retrograde-inversion, multiplication). George Perle describes their use as "pivots" or non-tonal ways of emphasizing certain pitches. Invariant rows are also combinatorial.

Example Usage of Invariant
invariant: The LA Times is reporting that Roy E Disney has passed away at age 79. (via @MousePlanet)
goldkin: @Gldm One pass, non-trivial update time (~O(n log n)). My variation adds an Invariant to select only a single window per term -- in theory.
regnerjr: #EE3220 digital filters are awesome because the're linear, time Invariant, and causal.
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