Equal temperament makes any piece transposable without changing tonal relations

Evidence

On a piano, all adjacent keys, whether they be pairs of white keys not seperated by a black key or a white key followed by a black key, differ by (apart from the Railsback effect; see figure 19.2) exactly the same frequency ratio—namely, 21/12, or 100 cents. This means that any piece of music can be transposed up or down to start on a different tonic without changing its tonal relationships. — Eric J. Heller, Why You Hear What You Hear- An…, 2399

Categorization

Category: Causal Relationships