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In music theory, the spiral array model is an extended type of pitch space. A mathematical model involving concentric helices (an "array of spirals"), it represents human perceptions of pitches, chords, and keys in the same geometric space. It was proposed in 2000 by Elaine Chew in her MIT doctoral thesis Toward a Mathematical Model of Tonality ...
Added tone chord notation is useful with seventh chords to indicate partial extended chords, for example, C 7add 13, which indicates that the 13th is added to the 7th, but without the 9th and 11th. The use of 2, 4, and 6 rather than 9, 11, and 13 indicates that the chord does not include a seventh unless explicitly specified.
Methods that establish the key for a particular piece can be complicated to explain and vary over music history. [citation needed] However, the chords most often used in a piece in a particular key are those that contain the notes in the corresponding scale, and conventional progressions of these chords, particularly cadences, orient the listener around the tonic.
But this rule not only applies to major or minor chords, but also to seventh chords. For example, in the key in E minor, the tonic chord (E, G, B) becomes an E minor seventh chord (E, G, B, D), if the fourth note (D) is added to the triad. This applies to all other chords in the scale. [1] A mnemonic also exists in the circle of thirds.
Minor 6/9 C chord, featuring the major sixth degree of the jazz minor scale. [16] Play ⓘ Second factor (D), in red, of a C added second chord, C add2. Play ⓘ The 6/9 chord is a pentad with a major triad joined by a sixth and ninth above the root, but no seventh. For example, C 6/9 is C–E–G–A–D.
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The actor, 48, announced his reconciliation with Cope, 37, on Dec. 4 via Instagram, and is now opening up about how "thankful" he is to have their relationship back on track after she filed for ...