A composer moves from C major (C-E-G) to A minor (A-C-E) in four voices. Both chords share the notes E and A. Which approach best reflects smooth voice leading?
AMove all four voices to new positions to create harmonic contrast and avoid stagnation
BHold E and A as common tones in the same voices, and move remaining voices by the smallest available step
CMove all voices in parallel motion downward to maintain rhythmic coordination
DAssign all voices to the nearest chord tone by pitch distance, regardless of common tones
Smooth voice leading prioritizes two strategies: hold common tones in place (E and A appear in both chords and should stay in the same voices), and move the remaining voices by step. This minimizes total melodic distance and creates the connected, flowing texture characteristic of smooth voice leading. Moving all voices (option A) throws away the common-tone anchors unnecessarily. Parallel motion (option C) risks parallel octaves and fifths, and obliterates voice independence.
Question 2 Multiple Choice
A student argues that smooth voice leading means 'always move by the smallest interval possible, even if that creates parallel octaves between the soprano and bass.' What is wrong with this reasoning?
ANothing — parallel octaves are permitted in smooth voice leading because they reduce total melodic distance
BSmooth voice leading minimizes individual voice motion but does not override voice-independence rules; a mix of motion types (contrary, oblique, similar) serves both goals
CThe student should instead prioritize contrary motion in all voice pairs, regardless of interval size
DParallel octaves are only forbidden in choral writing, not in instrumental composition
Smooth voice leading is a principle of efficiency, not a mandate to minimize every interval at the expense of everything else. Parallel octaves and fifths destroy voice independence — one of the foundational rules of contrapuntal writing — and are never justified by mere stepwise efficiency. The solution is a mix of contrapuntal motion types: oblique motion holds common tones (zero movement), stepwise motion handles non-common voices, and contrary motion in outer voices adds balance. Smooth voice leading operates within, not above, the rules of voice independence.
Question 3 True / False
In smooth voice leading, a note that appears in both the current chord and the next chord should be held in the same voice rather than leaping away.
TTrue
FFalse
Answer: True
Common tones are the anchor points of smooth voice leading. When two adjacent chords share a note (e.g., C major and A minor both contain E), keeping that note in the same voice requires zero movement from that voice, which is the smoothest possible result. Leaping away from a common tone and then back introduces unnecessary motion. Holding common tones also reduces the number of voices that need to move, making it easier to achieve stepwise motion in the remaining voices.
Question 4 True / False
In smooth voice leading, contrary motion — where two voices move in opposite directions — is undesirable because it prevents the voices from arriving at the same chord together.
TTrue
FFalse
Answer: False
Contrary motion is actually valued in smooth voice leading, particularly between the outer voices (soprano and bass). It prevents voices from crowding into the same register, adds balance to the texture, and avoids the parallel octaves and fifths that parallel motion risks. All four motion types (parallel, similar, contrary, oblique) play a role in well-voiced writing. Contrary motion does not prevent arriving at the same chord — it simply means the soprano and bass approach the next chord from opposite directions, which is often the most elegant option.
Question 5 Short Answer
Why does a chord progression voiced with smooth voice leading sound more 'connected' or 'inevitable' than the same progression voiced with unnecessary leaps?
Think about your answer, then reveal below.
Model answer: When each voice moves by the smallest possible interval, the ear perceives each voice as a continuous melodic line rather than a series of unrelated pitches. The voices maintain their individual identity across chord changes, and the texture sounds like four singers moving through the harmony rather than four instruments being switched on and off at each chord. Unnecessary leaps interrupt this melodic continuity and make the progression sound mechanical or assembled — as though chords were stacked independently rather than woven together.
Bach chorales are the canonical model precisely because Bach treated smooth voice leading as an expressive tool: the progression feels inevitable because each voice is doing as little work as possible to get to the next harmony. This perceptual effect is both acoustic (less pitch distance = smoother motion) and cognitive (stepwise motion is processed as melodic continuation, not as new events). The same chord sequence voiced with wide leaps loses this continuity and forces the ear to 'restart' at each chord change.