page_title: Ninth
section_title: Ninth chords
hierarchical_section_title: Ninth / Ninth chords
caption_attribution_description: English: Minor ninth chord on C. Created by Hyacinth (talk) 10:31, 29 May 2011 (UTC) using Sibelius 5. See: File:Minor_ninth_chord_on_C.mid
context_page_description: In music, a ninth is a compound interval consisting of an octave plus a second.
  Like the second, the interval of a ninth is classified as a dissonance in common practice tonality. Since a ninth is an octave larger than a second, its sonority level is considered less dense.
context_section_description: Three types of ninth chords may be distinguished: dominant (9), major (M9), and minor (m9). They may easily be remembered as the chord quality of the seventh does not change with the addition of the second scale degree, which is a major second in both major and minor, thus:
  0 4 7 t + 2 = dominant seventh + ninth = dominant ninth chord
  0 4 7 e + 2 = major seventh + ninth = major ninth chord
  0 3 7 t + 2 = minor seventh + ninth = minor ninth chord
  The dominant ninth (V₉) is a dominant seventh plus a major or minor ninth.
caption: Minor ninth chord on C. About this soundPlay (help·info)
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