Questions: Tonicization and Harmonic Coloring

Question 1

In a passage in C major, an A7 chord appears and resolves to G major. This is best described as:

• A. A modulation to G major, since A7 is the dominant of G
• B. A tonicization of scale degree V — the A7 (V7/V) intensifies the arrival on the dominant without establishing G as a new tonic
• C. A borrowed chord from C minor, adding modal color to the progression
• D. A tonicization of scale degree IV, using A7 as a color chord

Answer: (B)

A7 is V7 of G — it applies dominant function to G major, making the G arrival feel more emphatic. Because this intensification is brief and the home key (C major) is not abandoned, it is a tonicization of scale degree V, not a modulation. The distinction matters: no cadence in G is articulated, and the passage continues in C. Option D is wrong: A7 resolves to G (scale degree V), not to F (scale degree IV). This move — V/V to V — is described as the most common tonicization, appearing 'in almost every tonal style from Bach to Brahms.'

Question 2

What is the most reliable indicator that a passage contains a tonicization rather than a modulation?

• A. The passage uses an applied dominant chord
• B. The passage briefly emphasizes a non-tonic scale degree but returns to the home key without a full authentic cadence in the new key
• C. The tonicized scale degree is the dominant (scale degree V)
• D. The applied chord resolves by half step in at least one voice

Answer: (B)

The key criterion is whether a full authentic cadence is articulated in the new key. A tonicization uses applied dominant function to color a scale degree momentarily, then moves on — the home key is never truly abandoned. A modulation is confirmed when a new key is established by a cadence (especially a full authentic cadence) and possibly reinforced over multiple phrases. Option A is wrong because applied dominants appear in both tonicizations and modulations. Option C is wrong because any scale degree can be tonicized.

Question 3

A tonicization requires a full authentic cadence in the tonicized key to successfully emphasize that scale degree.

• T. True
• F. False

Answer: False

This confuses tonicization with modulation. A tonicization deliberately avoids full cadential establishment of the new key — that is what distinguishes it from modulation. A tonicization needs only an applied dominant (or other applied chord) that resolves to the target scale degree. The momentary emphasis is achieved by the dominant-function approach, not by a full cadential formula. When a full authentic cadence does land in the 'new key,' you have likely crossed the line into modulation.

Question 4

Tonicizing scale degree V (placing V/V before V) is the most common tonicization because it intensifies the approach to the dominant at cadence points.

• T. True
• F. False

Answer: True

V/V → V is the paradigm case of tonicization. The dominant is already the most structurally important non-tonic scale degree, and intensifying its arrival by approaching it with its own applied dominant makes cadences feel more emphatic and purposeful. This move is ubiquitous in tonal music: Bach uses it constantly, and it appears throughout the Classical and Romantic repertoire. The fact that it appears 'in almost every tonal style from Bach to Brahms' confirms its status as the most common and structurally significant tonicization.

Question 5

Why does a tonicization not constitute a modulation, even when it prominently emphasizes a non-tonic scale degree with an applied dominant?

Model answer: A tonicization differs from a modulation in scale and commitment. Tonicization applies dominant function to a scale degree long enough to color it — to make it feel momentarily like a local tonic — but then moves on without establishing the new key. Modulation requires the new key to be genuinely established: a full authentic cadence in the new key, often reinforced over more than one phrase, such that listeners genuinely reorient and accept it as the new home. The rule of thumb is: if the passage returns to the original key without a clearly articulated cadence in the new key, it was probably a tonicization. Tonicization enriches the harmonic surface; modulation is a structural event that changes the architecture of the form.

This distinction is practically important because it determines how you analyze form and how you compose. A tonicization is a surface coloristic event — it doesn't change the structural key center. A modulation requires you to reorient your entire sense of harmonic function. Conflating the two leads to over-parsing (hearing every applied chord as a key change) or under-parsing (missing genuine modulations). The duration and cadential weight of the non-tonic emphasis is the deciding factor.