Chord Transition Atlas Functional harmony map · Key of {{ keyName }} major · {{ nodeCount }} chords · {{ edgeCount }} transitions

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Transition logic

Functional pull — root by 5th, tendency tones resolve

Substitution — tritone, deceptive, backdoor

Voice-leading — chromatic or stepwise lines, held tones

Modal colour — borrowed tones, mood shifts

Steel arrows leave the selected chord · grey arrows arrive · Esc clears

Secondary dominants · V7 of each diatonic target

Diminished · passing

Chromatic dominants

T · Tonic

SD · Predominant

D · Dominant

Modal interchange · borrowed from parallel modes

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How to read

Every node is a chord. Every arrow is a reason.

Pick a chord to light up where it can go next. Each move is explained by the root motion or voice-leading that makes it work. Filter by genre to see which moves each tradition leans on.

CentreDiatonic chords grouped by function: T, SD, D TopSecondary dominants — V7 of each target RightTritone, German-sixth and backdoor dominants LeftDiminished passing chords BottomChords borrowed from parallel modes — minor, Lydian, Mixolydian, Phrygian

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No moves from this chord in the selected genre.

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