Questions: Species Counterpoint in Free Composition

Question 1

In a Bach chorale, the soprano and bass move together on every chord change while an inner voice sustains a dissonant seventh through a barline and resolves downward by step on the next beat. Which species framework best describes the inner voice?

• A. First species — both voices move together on strong beats
• B. Second species — the inner voice moves twice as fast as the bass
• C. Fourth species — a syncopated suspension prepared on a weak beat, held through a strong beat, resolved by step
• D. Third species — four notes against one, passing through the dissonance

Answer: (C)

The suspension pattern — dissonance prepared on a weak beat, held (syncopated) through a strong beat, resolved by descending step — is the defining feature of fourth species counterpoint. In free composition, Bach embeds this exact logic in his inner voices within a harmonic context; the species framework is not an analogy but the literal grammar of the voice-leading. The soprano-bass pair in option A describes a first-species relationship between those two voices, not the inner voice in question.

Question 2

What serves as the functional equivalent of the cantus firmus when applying species counterpoint analysis to Bach chorales?

• A. The soprano melody, which moves most actively
• B. The bass line, which provides harmonic support
• C. The harmonic progression, which is the fixed structure all voices navigate
• D. There is no cantus firmus equivalent — species analysis cannot apply to harmonically driven music

Answer: (C)

In species exercises, the cantus firmus is the given, fixed melody against which you add a voice. In free tonal composition, the harmonic progression plays this role: it is the pre-determined structure (explicit or implicit) against which all voices must navigate. This is the key conceptual bridge — species principles don't disappear in free composition, they are applied against a different kind of fixed framework. Recognizing this explains why the voice-leading discipline from exercises directly informs the craft of composed music.

Question 3

Parallel fifths are prohibited in free composition (such as Bach chorales) for the same fundamental reason they are prohibited in species counterpoint exercises.

• T. True
• F. False

Answer: True

The prohibition on parallel fifths is not an arbitrary stylistic rule that varies by period — it reflects the deeper species principle of voice independence. In first species, moving two voices in parallel fifths collapses their independence, making them sound like a single entity. This violation of contrapuntal independence is why parallel fifths undermine voice-leading quality in all tonal contexts. The harmonic richness of Bach does not override this constraint; rather, Bach's sophistication is partly demonstrated by his consistent avoidance of parallels.

Question 4

Species counterpoint is primarily a historical and pedagogical exercise with little direct relevance to understanding how Bach's music actually works.

• T. True
• F. False

Answer: False

This is the central misconception the topic addresses. Species principles — suspension logic, stepwise voice motion, treatment of dissonance, independent voice movement — are not merely pedagogical tools. They operate beneath the surface of tonal counterpoint, including Bach chorales. A chain of 7-6 suspensions in an inner voice is pure fourth-species logic; soprano-bass pairs in chorales often operate in de facto first species. The species framework is an analytic lens that reveals the grammar of voice-leading in composed music.

Question 5

When composing in functional harmony using species discipline, what does the harmonic progression replace, and how does this change how you apply species rules?

Model answer: The harmonic progression replaces the cantus firmus as the fixed structure against which voices navigate. This changes species application in two main ways: (1) chord tones can justify dissonance on strong beats without classical preparation (e.g., a major seventh in the chord sits strongly without needing the preparation that fourth species requires), and (2) you must balance horizontal voice-leading continuity against vertical harmonic correctness. But the core disciplines remain: prefer stepwise motion, prepare and resolve leaps, control dissonance, and maintain voice independence.

The key insight is that species counterpoint is not discarded in free composition — its logic is adapted to a different fixed structure. Understanding this explains why sketching soprano and bass as a two-voice framework first (as Bach appears to have done) is not a classroom trick but a genuine compositional method: you are applying first-species discipline to your primary voices before filling in the rest.