7.2 Tonicization vs. Modulation

Tonicization

Tonicization briefly makes a non-tonic chord sound like a temporary tonic — usually via a secondary dominant — without truly leaving the home key. It's a fleeting emphasis.

Modulation

Modulation is a full change of key, established by a cadence in the new key and confirmed over time. Tonicization is momentary; modulation is a genuine, lasting shift.

Pivot chords

A common technique is the pivot chord (common chord): a chord that belongs to both keys, smoothing the transition from the old key to the new one during a modulation.

Key terms

Tonicization

brief emphasis of a non-tonic chord as a temporary tonic

Modulation

a full, lasting change of key

Difference

tonicization is momentary; modulation lasts

Pivot chord

a chord shared by both keys, smoothing modulation

Confirmation

a cadence in the new key confirms a modulation

Try an AP-style question

Tonicization differs from modulation because it…

1. permanently changes the key
2. is brief, without a new key cadence
3. always goes to the relative minor
4. requires a new key signature