Chapter 3

Part 2

Consonance and Dissonance

• Intervals that are treated as STABLE and not requiring resolution are considered CONSONANCE.

• Consonant intervals are P1, m3, M3, P5, m6, M6 and P8.

• All other intervals within the octave are considered DISSONANT.

Augmented and Diminished Intervals

• If a perfect or major interval is made one half step larger (without changing its interval number) it becomes AUGMENTED.

• If a perfect or minor interval is made one half step smaller (without changing its interval number) it becomes DIMINISHED.

Augmented and Diminished Intervals

• Note the standard abbreviation for diminished and augmented intervals.

Enharmonic Intervals

• Intervals with the same sound that are spelled differently.

Spelling Intervals

• Take care in spelling intervals. If a specific interval is requested, the enharmonic equivalent spelling is not correct.

The TRITONE

• The most common enharmonic intervals are the augmented fourth and the diminished fifth

The TRITONE

• The augmented 4th and the diminished 5th are usually called the TRITONE, since they contain three whole steps.

Classwork and Homework

• Homework: WORKBOOK 3A, 41-100– due Thursday, October 3.