A student writes an antecedent phrase that ends with a perfect authentic cadence (full resolution to tonic). What problem does this create for the period structure?
ANothing — any cadence type can end an antecedent; the label 'antecedent' is purely positional
BThe antecedent resolves too completely, destroying the question-and-answer dynamic; the consequent has nothing left to answer
CThis creates a contrasting period, which is a valid variant of standard period structure
DThe problem is only rhythmic; a PAC at the antecedent creates metric imbalance
The antecedent's job is to pose an unresolved question — it should end on a half cadence (landing on V) or at most an imperfect authentic cadence to leave harmonic tension. A perfect authentic cadence closes on tonic with full finality, giving the listener a sense of completion. If the antecedent closes that completely, the consequent becomes redundant rather than a genuine 'answer,' and the period logic collapses. The harmonic tension at the end of the antecedent is what makes the consequent's resolution feel earned.
Question 2 Multiple Choice
You are writing a parallel period. The consequent begins with the same melodic material as the antecedent. Where and how should it diverge to complete the period effectively?
AIt should introduce completely new melodic material as early as possible to create contrast
BIt should end with another half cadence to extend the period into a larger structure
CIt should diverge near the end to arrive at a perfect authentic cadence, providing closure the antecedent withheld
DIt should be extended to twice the length of the antecedent to add weight to the resolution
In a parallel period, shared opening material unifies the two phrases as a single musical thought — the listener recognizes the repeated start as a continuation, not a new idea. The divergence happens toward the cadence: where the antecedent turned toward V (the half cadence), the consequent steers toward I with a perfect authentic cadence. This is the 'answer' that resolves the question. Changing the material entirely early on produces a contrasting period, not a parallel one; ending on another half cadence extends tension without providing closure.
Question 3 True / False
A period is a formal unit made of two or more phrases where the consequent provides harmonic closure that the antecedent's half cadence withheld.
TTrue
FFalse
Answer: True
This captures the essential antecedent–consequent logic: the antecedent's half cadence (landing on V) creates an open, expectant feeling — the musical 'question.' The consequent resolves this by arriving at a perfect authentic cadence on I — the 'answer.' Together, the two phrases create a complete musical thought that neither phrase achieves alone. This question-answer structure is what distinguishes a period from two unrelated phrases that happen to follow each other.
Question 4 True / False
In a standard antecedent–consequent period, the antecedent phrase ends on tonic (I), creating a moment of rest before the consequent phrase begins its motion toward the dominant.
TTrue
FFalse
Answer: False
This reverses the correct structure. The antecedent ends on the dominant (V) via a half cadence — this is the 'question,' the unresolved moment of expectation. The consequent then travels from that point of tension back to tonic (I), arriving at a perfect authentic cadence — the 'answer.' Ending the antecedent on tonic would create premature closure and eliminate the harmonic tension that makes the consequent feel necessary.
Question 5 Short Answer
Why do composers 'plan from the cadence outward' when writing periods, rather than writing the melody first and deciding on cadences at the end?
Think about your answer, then reveal below.
Model answer: Cadences are the structural goals that give a period its shape and direction. Without deciding in advance where the antecedent will land (V, creating tension) and where the consequent will resolve (I, providing closure), melody writing has no target — each phrase risks arriving at an arbitrary harmonic point. Planning cadences first establishes the question-answer framework: once you know the antecedent ends on V and the consequent ends on I, the melodic and harmonic path through each phrase becomes a matter of leading toward those goals. The period's architecture is the cadences; the melody is how you get there.
This compositional approach reflects a broader principle: large-scale structure in tonal music is organized around cadential goals, not moment-to-moment melodic decisions. A composer who writes free melody and hopes a coherent period emerges will often find the cadences fall in the wrong place or at incompatible harmonic points. Fixing the endpoint first makes every preceding beat purposeful — the music is always moving toward something the listener can sense is coming.