A borrowed chord (also called mode mixture,Romeo, Sheila (1999). Complete Rock Keyboard Method: Mastering Rock Keyboard, p. 42. . Bouchard, Joe and Romeo, Sheila (2007). The Total Rock Keyboardist, p. 120. Alfred Music. . modal mixture, substituted chord,White, William Alfred (1911). Harmonic Part-writing, p. 42. Silver, Burdett, & Co. . modal interchange, or mutation
Borrowed chords are distinguished from modulation by being brief enough that the tonic is not lost or displaced, and may be considered brief or transitory modulations and may be distinguished from Sorce, Richard (1995). Music Theory for the Music Professional, p. 332. Scarecrow Press. . as well as . According to Sheila Romeo, "the borrowed chord suggests the sound of its own mode without actually switching to that mode."
In the minor mode, a common borrowed chord from the parallel major key is the Picardy third.
In the major mode, the most common examples of borrowed chords are those involving the , also known as the lowered sixth scale degree. These chords are shown below, in the key of C major.Kostka, p. 344.
\clef treble \time 4/4 1_\markup { \translate #'(-7.5 . 0) { \concat { \small "C Maj.:" \hspace #1 \normalsize "vii" \raise #1 \small "o7" \hspace #3.5 "ii" \raise #1 \small "o" \hspace #5.5 "ii" \raise #1 \small "ø7" \hspace #5 "iv" } } } | " } } |
\clef treble \time 4/4 | " } } |
Chord progressions may be constructed with borrowed chords, including two progressions common in rock music, I–VII–VI–VII, common everywhere, and I–VI–IV (), used by bands like Genesis, Yes, and Nirvana. VII is from Mixolydian mode and VI is found in both Aeolian mode and Phrygian mode. The VII–I cadence with VII substituting for V is common, as well as II–I, III–I, and VI–I.Romeo (1999), p. 43. In popular music, the on the lowered third (III), sixth (VI) and seventh (VII) are common.
Borrowed chords have typical Inverted chord or common positions, for example ii6 and ii, and progress in the same manner as the diatonic chords they replace except for VI, which progresses to V(7).
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