Tritone substitutions in G major

Every dominant in G major, and its substitute

• D7V7→G

  A7subV7→G

  A♭7 substitutes for D7, the dominant of G major. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: F♯ and C in D7, G♭ and C in A♭7.

• E7V7/ii→Am

  B7subV7/ii→Am

  B♭7 substitutes for E7, the dominant of A minor. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: G♯ and D in E7, A♭ and D in B♭7.

• F7V7/iii→Bm

  C7subV7/iii→Bm

  C7 substitutes for F♯7, the dominant of B minor. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: A♯ and E in F♯7, B♭ and E in C7.

• G7V7/IV→C

  C7subV7/IV→C

  C♯7 substitutes for G7, the dominant of C major. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: B and F in G7, B and E♯ in C♯7.

• A7V7/V→D

  E7subV7/V→D

  E♭7 substitutes for A7, the dominant of D major. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: C♯ and G in A7, D♭ and G in E♭7.

• B7V7/vi→Em

  F7subV7/vi→Em

  F7 substitutes for B7, the dominant of E minor. They share the same tritone, so the bass can fall a semitone instead of a fifth. Shared notes: D♯ and A in B7, E♭ and A in F7.