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Music theory

Music theory, applied to AI generation.

Modal InterchangeModal interchange borrows chords from a parallel mode to add emotional color.Tritone SubstitutionTritone substitution replaces a dominant chord with another a tritone away — adding chromatic flavor.Secondary DominantsSecondary dominants are dominant chords of any chord other than the tonic — adding pull and direction.Voice LeadingVoice leading is the smooth motion of individual notes between chords — the foundation of professional harmony.ModulationModulation is the process of changing keys mid-song — refreshing energy and creating drama.Circle of FifthsThe Circle of Fifths is a visual representation of all 12 keys arranged by perfect fifths.SyncopationSyncopation places accents on weak beats or off-beats — creating groove and rhythmic interest.PolyrhythmPolyrhythm layers multiple rhythmic patterns at the same time — creating complex, hypnotic textures.CounterpointCounterpoint is the art of combining independent melodies that sound good together.Melodic ContourMelodic contour is the shape of a melody — its rises, falls, and peaks across time.Tension and ReleaseTension and release is the heartbeat of music — building dissonance and resolving it.CadenceA cadence is a harmonic conclusion — the way phrases end and breathe.Pedal PointA pedal point is a sustained note held while harmony changes above it — creating tension and continuity.Motif DevelopmentMotif development is the technique of varying a small musical idea throughout a piece.Suspended ChordsSuspended chords replace the third with a fourth or second — creating ambiguous, hopeful tension.Extended Chords (7ths, 9ths, 11ths, 13ths)Extended chords add 7ths, 9ths, 11ths, and 13ths above the basic triad — creating jazz sophistication.Chord InversionsChord inversions change which note is at the bottom — affecting bass motion and voicing.Song FormSong form is the structural arrangement of sections — verse, chorus, bridge, and beyond.Chord SubstitutionChord substitution replaces a chord with a different one that performs the same function — adding sophistication.Parallel KeysParallel keys share the same tonic but have different modes — like C major and C minor.
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