Key Takeaways
- All three V7 inversions follow one set of resolution rules: tendency tones (vii→ up to tonic; chordal 7th→ down by step), scale degree V stays, scale degree ii moves freely
- Bass inversion determines resolution target: V6-5 → I, V4-2 → I6, V4-3 → I or I6 (two options); voice leading is only strict when resolving to tonic
- The scale degree IV problem: bass can descend IV→III freely, but IV ascending to V requires a predominant over scale degree IV — you can't use V4-2 to climb upward
Tendency Tones & Resolution Rules ▶ 1:00
- vii (leading tone) = tendency tone → resolves up by step to tonic (in any voice, including bass)
- Chordal 7th (scale degree iv) = tendency tone → resolves down by step to scale degree iii
- Scale degree V = common tone, stays put; scale degree ii = free, typically moves down to i, sometimes up to iii
Resolution Summary by Inversion ▶ 6:00
| Chord | Bass note | Resolves to |
|---|---|---|
| V6-5 | vii (tendency ↑) | I (root position only) |
| V4-2 | chordal 7th (tendency ↓) | I6 (first inversion only) |
| V4-3 | scale degree ii (free) | I or I6 |
- Voice leading is strict only when resolving to tonic; moving between V7 chords (any inversion) is completely free
Dominant Triads as "Incomplete" Inverted V7s ▶ 7:46
- viio6 = V4-3 minus the root → behaves identically to V4-3
- V6 = V6-5 minus the chordal 7th → behaves identically to V6-5 (leading tone in bass → root-position I)
- viio (root position) and V6-4 are rare; use only when forced by texture
Stepwise Bass Lines in the Bottom Tier ▶ 9:57
- Bottom tier = scale degrees vii–I–ii–iii–IV–V; inverted V7s enable stepwise bass throughout
- Zigzagging: bass oscillates around tonic (e.g., I–V4-3–I–V6-5–I); inverted dominants embellish tonic without displacing it
- Rising line limit: ascending bass can't pass through scale degree IV using only tonics/dominants — V4-2 must resolve down, so a predominant is required over IV to continue rising to V
- Analyzed examples: Beethoven C-minor Piano Trio ▶ 10:52, Schubert C-minor Sonata, Beethoven Op. 109, Mendelssohn Piano Trio Op. 1 ▶ 16:58
Leaping Bass Lines ▶ 18:47
- Bass may leap freely into an inverted V7; only the resolution step out to tonic must be stepwise
- Analyzed examples: Mozart K. 464 String Quartet, Beethoven 9th slow movement, Mozart D-minor Fantasy ▶ 19:00
Approaching Inverted V7s from Predominants ▶ 21:47
- Voice leading from pre-dominants (PD) into inverted V7s is free but tends to be smooth (stepwise), not leapy
- Analyzed: Bach Ich bin's chorale, Haydn Op. 20 String Quartet ▶ 22:27
Voice-Leading Exceptions ▶ 26:00
- V4-2 exception: scale degree ii (chordal 5th, top voice) often leaps up to scale degree V instead of moving by step — common pattern, not a tendency tone so it's permitted
- V4-3 exception: when V4-3 → I6, chordal 7th sometimes rises instead of falling — occurs when top voice moves in parallel tenths with bass; linear logic overrides tendency tone resolution
- Analyzed: Beethoven Pathétique slow mvt. ▶ 26:00, Beethoven Op. 31 No. 3 Scherzo ▶ 27:00