A chord search can be used to list all the possible ways a given chord can function as a pivot chord. List all the functions of that quality of chord in both major and minor keys. Determine the keys in which the given chord would have these functions. Sample chord searches for each quality triad are shown below. May be analyzed with a common chord, but the sequence is equally important in establishing the new key.
Many sequential modulations are short and so can be thought of as tonicizations.
A chromatic modulation is a change of key brought about through a chromatic alteration of a note between two chords. Music in Theory and Practice , 5th ed. Tonal Harmony with an Introduction to Twentieth-Century Music , 2nd ed.