Thirteenth 428268 225721268 2008-07-15T02:08:18Z Hyacinth 17171 [[Image:Thirteenth chord diatonic on C.mid]] In [[music]] or [[music theory]], a '''thirteenth''' is the [[note]] thirteen [[scale degree]]s from the [[root]] of a [[chord (music)|chord]]. A thirteenth is a [[compound interval|compound]] [[sixth]] (an [[octave]] plus a sixth). [[Image:thirteenth_chord.gif|frame|right|Thirteenth chord {{Audio|Thirteenth chord diatonic on C.mid|Play}}]] A '''thirteenth chord''' is a [[tertian]] chord containing the interval of a thirteenth, and is an [[extended chord]] if it includes the [[ninth]] and the [[eleventh]]. A chord containing the interval of a thirteenth without the intervals of the ninth and eleventh are often called [[sixth chord]]s. In the '''dominant thirteenth chord''' {{Audio|Dominant thirteenth chord on C.mid|play}} (C E G B♭ D F A) the eleventh is usually omitted. In modern pop/jazz harmony, a thirteenth chord (usually notated as '''13''', e.g. C13) contains an implied flatted seventh interval. Thus, a C13 consists of C E G B♭ and A. The underlying harmony during a thirteenth chord is usually [[Mixolydian mode|Mixolydian]] or [[Lydian mode|Lydian]] Dominant. A thirteenth chord does not imply the quality of the ninth or eleventh scale degrees. In general, what gives a thirteenth chord its characteristic sound is the dissonance between the dominant seventh and the thirteenth. In rare cases, the seventh of such a chord may retain its diatonic (and therefore non-lowered) pitch, but when this is the case, the thirteenth chord will nearly always feature a chromatically raised eleventh. {{Chords}} {{music-theory-stub}} [[Category:Musical terminology]] [[cs:Tercdecima (hudba)]] [[de:Tredezime]] [[it:Accordo di tredicesima]] [[nl:Tredecime]] [[pl:Tercdecyma]] [[ru:Терцдецима]]