Overview of Chord Symbols and Roman Numerals R = root of chord: leter name or Roman numeral

T = third of chord (leter name)

V = fifh of chord (leter name)

X = seventh of chord (leter name)

Triads

major R Rminor Rm rdiminished Rdim r°

Tetrads (seventh chords)

dominant R7 R7

major Rmaj7 R7 Tere is no diference between the labels for major seventh and dominant seventh chords.

minor Rm7 r7

half-diminished R∅7 r∅7

fully diminished * Rdim7 r°7 * All thirds are minor (3 semitones). Absent from the diatonic scale.

Inversions

frst-inversion triad (e.g. major) R/T R In Roman numerals, the bass note is not made explicit. Te generic interval of the root above the bass (or the bass below the root) = the lowest even number in the fgured bass element. E.g. in V4/2 in C major, the root is G and the bass is a second below that in the diatonic scale, i.e. F.

second-inversion triad (e.g. major) R/V Rfrst-inversion tetrad (e.g. dominant) R7/T Rsecond-inversion tetrad (e.g. dominant) R7/V Rthird-inversion tetrad (e.g. dominant) R7/X R

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Diatonic Triads in Major Keys

I ii iii IV V vi vii°

Diatonic Triads in Minor Keys + the dominant triad (with leading tone)

i ii° III iv v VI VII V

Diatonic Tetrads in Major Keys

I7 ii7 iii7 IV7 V7 vi7 vii∅7

Diatonic Tetrads in Minor Keys + the dominant tetrad (with leading tone)

i7 ii∅7 III7 iv7 v7 VI7 VII7 V7

In the diatonic scale, diminished triads become half-diminished sevenths.