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Chords • Although there are many types of chords and chord qualities, we will focus on the basics; Triads and Seventh chords. • Triads are 3 note chords stacked in 3rds. • Root, 3rd, 5th I-3-5 C-E-G • 7th chords are (usually) 4 note chords stacked in 3rds. • Root, 3rd, 5th, 7th I-3-5-7 C-E-G-B
Chord Qualities • There are four main chord qualities that are used regularly in composition. • The examples given are for triads. • Major M3, m3 (C-E-G) • Minor m3, M3 (C-Eb-G) • Diminished m3, m3 (C-Eb-Gb) • Augmented M3, M3 (C-E-G#)
Diatonic Triads and 7th Chords • Diatonic means anything within a given key signature or scale. • Order of 3rd’s-C E G B D F A C E G B D F A C E G B D F A (etc.) • When stacking notes in thirds, they must be in this order. However, accidentals are not included-they must be added to determine tonality. • There is a formula that can be used in both major and minor keys to create triads and 7th chords when dealing with diatonic keys. • Ex. In a major key, C, there are no sharps and no flats. If you create triads using the “order of 3rds” list in your given key, you will create the following chords: • I (CEG) ii (DFA) iii (EGB) IV (FAC) V (GBD) vi (ACE) vii* (BDF) • It is important to note that the root of each triad follows the C major scale and corresponds to the scale degree of the chord associated to the triad. • I=Major one, Starts on C which is scale degree one.
Diatonic Chord Progressions • Major Chord Progression [Triads; Root, 3rd, 5th] • I ii iii IV V vi viiº • Major Chord Progression [Seventh Chords; Root, 3rd, 5th, 7th] • I 7 ii 7 iii 7 IV 7 V 7 vi 7 viiº 7 • Minor Chord Progression [Triads] • i iiº III iv V VI viiº • Minor Chord Progression [Seventh Chords] • i 7 iiº 7 III7 iv 7 V 7 VI7 viiº 7