Harmonic Intervals - Consonant and Dissonant

Question 1

big idea

Answer 1

• there are different types of consonant intervals and different types of dissonant intervals

Question 2

consonant intervals

Answer 2

• perfect consonant intervals
• P4, P5, P8, or P1 (perfect unison)
• imperfect consonant intervals (good but not perfect)
• M3, m3, M6, m6
• the perfect unison is good to use as the first or last note so do not use beside the first or last note
• perfect octave, use very sparingly
• perfect 5th, very stable but unclear on quality of chord because the 3rd is missing. usable, but use infrequently

Question 3

counterpoint avoidance

Answer 3

• NO PARALLEL MOTION BETWEEN PERFECT INTERVALS
• Watch for hidden octaves or fifths
• hidden fifth: when the upper voice moves by a skip or leap and the bottom voice moves by step into a fifth
• hidden octave: when the upper voice moves by a skip or leap and the bottom voice moves by step into an octave
• parallel octaves by contrary motion: when parallel octaves occur even though they are moving in different directions
• parallel fifth by contrary motions: when parallel fifth occur even though they are moving in different directions
• make sure you avoid parallel unisons, parallel 8ths, parallel 5ths, and octaves by contrary motion
• try to avoid using the same note all the time

Question 4

good technique to use

Answer 4

• voice exchange: when two voices cross and flip the use of pairs (an example interval exchange would be 6, 8, 10)

Question 5

list three perfect consonant intervals

Answer 5

• PU – P5 – P8

Question 6

parallel motion between perfect intervals is, and will always be, prohibited

Answer 6

• true

Question 7

also in this era, a P4 is treated as a dissonant interval. from smallest to largest, list the three imperfect consonant intervals

Answer 7

• 1 – 5 – 8

Question 8

the term voice exchange describes the following intervallic pattern between the upper and lower voices

Answer 8

• 6 - 8 - 10