Whether a chord is borrowed from the parallel mode (modal interchange).
True when the chord is not diatonic to key but is diatonic to its
parallelKey — e.g. iv, bVI, or bVII in a major key, or the Picardy
tonic and major IV in a minor key. Two non-diatonic families are excluded:
chords diatonic to neither mode (they are chromatic, not borrowed), and, in
a minor key, chords explained by the harmonic minor scale (the major
dominant and raised-leading-tone chords), which are in-key alterations
rather than interchange even though they happen to fit the parallel major.
Whether a chord is borrowed from the parallel mode (modal interchange).
True when the chord is not diatonic to
keybut is diatonic to its parallelKey — e.g. iv, bVI, or bVII in a major key, or the Picardy tonic and major IV in a minor key. Two non-diatonic families are excluded: chords diatonic to neither mode (they are chromatic, not borrowed), and, in a minor key, chords explained by the harmonic minor scale (the major dominant and raised-leading-tone chords), which are in-key alterations rather than interchange even though they happen to fit the parallel major.