Dyad (music)

In music, a dyad (less commonly, diad) is a set of two notes or pitches.^[1] The notes of a dyad can be played simultaneously or in succession. Notes played in succession form a melodic interval; notes played simultaneously form a harmonic interval.

All dyads within an octave on C. Play^ⓘ

Dyads can be classified by the interval between the notes.^[2] For example, the interval between C and E (four half steps) is a major third, which can imply a C major chord, made up of the notes C, E and G.^[3]

In a triadic context chords with omitted thirds may be considered "indeterminate" triads.^[4] Play^ⓘ

Melodic and harmonic intervals, respectively above and below. Play^ⓘ

See also

• Double stop
• Interval (music)
• Power chord
• Harmonic series (music)
• Counterpoint

References

1. Harnsberger, Lindsey C. (1997). "dyad". Essential Dictionary of Music: Definitions, Composers, Theory, Instrument & Vocal Ranges. Los Angeles: Alfred Publishing. p. 47. ISBN 0-88284-728-7. OCLC 35172595. Retrieved 24 February 2009.
2. "Intervals and dyads – Open Music Theory". Open Music Theory. Retrieved 2015-12-06.
3. Young, Doug (2008). Mel Bay Presents Understanding DADGAD, p.53. ISBN 978-0-7866-7641-5.
4. Benjamin, et al. (2008). Techniques and Materials of Music, p.191. ISBN 0-495-50054-2.