Questions: Four-Part Writing: Distributing Harmony Across Voices

Question 1

When writing a root-position diminished triad (vii°) in SATB four-part writing, which chord member should typically be doubled?

• A. The root — because root-position chords always double the root
• B. The fifth — because the fifth is the most harmonically stable interval
• C. The third — because the root and fifth are tendency tones that create voice-leading problems when doubled
• D. Any note is equally acceptable since doubling rules don't apply to diminished chords

Answer: (C)

For regular major and minor triads, doubling the root is the default. But in vii°, the root is the leading tone (a strong tendency tone that resolves upward by half step) and the fifth is the diminished fifth (which resolves inward by step). Doubling either creates two voices that both need to resolve in the same direction — producing awkward parallels or unresolved tendency tones. The third is the most neutral member and is the standard doubling choice for diminished triads.

Question 2

A student voices a chord with soprano and alto just a half step apart. Beyond whether the current chord sounds acceptable in isolation, what is the primary concern with this voicing choice?

• A. It violates the rule that soprano and alto must always be at least a third apart
• B. The half-step interval creates a dissonance that is forbidden in diatonic harmony
• C. This voicing may force awkward leaps or produce forbidden parallel intervals when moving to the next chord
• D. The soprano note is likely outside its natural singing range

Answer: (C)

The key insight in four-part voice distribution is that voicing decisions are prospective — made in anticipation of where the next chord needs each voice to arrive. A tight cluster between soprano and alto may make smooth, independent voice leading to the next chord extremely difficult or force one voice into a large leap. Good SATB writers think one chord ahead: does this voicing give each voice a reasonable path forward? The current chord's sound in isolation is only part of the evaluation.

Question 3

In SATB four-part writing, the interval between the tenor and bass voices may exceed an octave without violating spacing conventions.

• T. True
• F. False

Answer: True

The spacing rule that limits intervals to within an octave applies between soprano and alto, and between alto and tenor — the three upper voices. The tenor-bass interval, however, can extend to a tenth or even a twelfth without causing imbalance, because the bass functions as a harmonic foundation rather than a melodic partner to the tenor. This asymmetry between the upper three voices and the bass is a standard feature of tonal SATB writing.

Question 4

Doubling the third of any triad in root position is a reliable technique for adding harmonic stability and fullness in SATB writing.

• T. True
• F. False

Answer: False

Doubling the third is generally avoided for major and minor triads. The third is the 'color' note — it distinguishes major from minor — and doubling it creates a sense of imbalance or excess color. The standard guidance is to double the root in root-position chords, or the fifth if voice leading demands it. The one important exception is the diminished triad (vii°), where the third is the preferred doubling precisely because the root (leading tone) and fifth (diminished fifth) are tendency tones that should not be doubled.

Question 5

Why do experienced SATB writers think about where each voice will go *next* when deciding how to voice the current chord? What goes wrong if you voice each chord in isolation?

Model answer: Voicing determines which voice is at which pitch level, which constrains what each voice can do next. If soprano ends up on a pitch that requires a large leap to reach the next chord's soprano note, or if two voices are positioned so that smooth continuation would create parallel fifths or octaves, the voicing must be revised — even if the current chord sounds fine alone. Voicing each chord in isolation ignores these downstream consequences and typically produces a sequence full of leaps, hidden parallels, and forced doublings. Good voice leading is an ongoing negotiation between the current and next chords simultaneously.

The interdependence of successive voicings is what makes SATB writing a skill rather than a lookup procedure. Each voicing creates constraints on the next; the art is selecting from the available options the one that opens up good possibilities rather than closing them off.