IAC PAC cad. extension
HC PAC
HC PAC
Theory Dr. Crist
Phrases and Period Forms
Phrase - a relatively independent musical thought terminated by a cadence. Phrases are labeled using
lower-case letters (a, b, c, etc.). The overlapping of phrases is referred to as "elision."
Period Forms - A period is the combination of 2-4 phrases and consequently involves 2-4 cadences. The
final cadence in a period is normally the strongest. In a two phrase period, there is typically an
antecedent-consequent relationship between the phrases. That relationship is established by means of a
stronger cadence at the end of the second phrase. This stronger cadence, usually a PAC, is referred to as a
"complete" cadence. A weaker cadence, such as an IAC, DC, or HC, is referred to as an "incomplete"
cadence. Two frequent possibilites exist:
1) a b 2) a b
HC IAC or PAC IAC PAC
Period Types:
1) Parallel - Both phrases begins with similar or identical material.
2) Contrasting -The Phrase begin with different, unrelated material.
3) Sequential - The material at the beginning of the two phrases is sequentially related.
