AP Music Theory Unit 8 Cheatsheet: Modes and Form

Modes are seven scales built on each scale degree of the major scale. Each has a distinct intervallic pattern and tonal character.

Identify modes by: Listening for the tonal center and comparing the scale to major or minor. Look for characteristic raised or lowered scale degrees.

Steps to label phrases:

1. Listen or read for natural phrase breaks (usually at cadences or rests)
2. Compare the melody of each phrase to others
3. Assign letters: first phrase = a
4. If the next phrase is identical, call it a; if varied, call it a′; if different, call it b
5. Continue through the passage

Example: A song with structure a a′ b a has two similar opening phrases, a contrasting middle, and a return to the opening idea.

• ☐ Can you name all seven modes and their characteristic intervals?
• ☐ Can you identify a mode by ear or from a score?
• ☐ Can you label phrase relationships (a, a′, b) in a melody?
• ☐ Can you distinguish antecedent from consequent by cadence type?
• ☐ Can you identify parallel vs. contrasting periods?
• ☐ Can you recognize introduction, verse, chorus, bridge, coda in a recording or score?
• ☐ Do you understand that modes create distinct tonal colors, not just pitch collections?
• ☐ Can you explain why a period feels complete while a single phrase may not?