# Dyad

Jump to navigation
Jump to search

*Not to be confused with Dyadic chord.*

English Wikipedia has an article on:

A **dyad** (less commonly, **diad**) is a chord of two pitch classes. In its simplest voicing, a dyad contains two notes, but it may also contain octave doublings (assuming octave equivalence). For example, a power chord is a dyad because it contains only two pitch classes a perfect fifth apart, even though it usually contains at least three notes.

Dyads can be classified by the interval between the notes, and as such the words *dyad* and *interval* are sometimes used interchangeably (on the Xen Wiki, especially to distinguish from the mathematical sense of *interval* (connected subset of the real line)).