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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.