Musical Intervals 2
Having learned the Unison, Tritone and Octave we add two more.
Consonance refers to notes sounding pleasant togeether, while dissonance is the opposite.
Surveying a random non-musicaly educated audience, the more consonant tones played together may be perceived as just one tone. The more dissonant notes are more often percieved as a combination of two tones played together. This in fact is one way of statistically defining these terms in an ordered sense, ...by polling an audience
The Unison is considered the most consonant, with the octave running a close second to it. The tritone however is considered very dissonant. Compare again the consonant sound of an octave with that of the tritone above.
The Intervals of a Perfect Fourth and a Perfect Fifth.
One semitone below the Tritone is the Perfect Fourth, and one above is the Perfect Fifth.
These are Inversions of each other. From C to F is a fourth. From C to G is a fifth. But from F to C is a fifth, and from G to C is a fourth. What we call them depends on what the starting or reference note is. If in the key of C, then F is the Fourth, and G is the Fifth. This would apply even if these notes were lower then the C, or in different octaves.
Terminology can be confusing in this way, but if not refering to a key, tonic or root, and just refering to the two notes, we would name them based on starting with the first note.
Intervals and inversions quiz in the key of C
Note:
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For an accurate score, choose only one answer per quiz question.
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Quiz 1
Click the ? ? ? to listen to the interval
Click below, naming the interval.
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Quiz 2
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Quiz 3
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Quiz 4
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Quiz 5
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Quiz 6
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Quiz 7
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Quiz 8
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Intervals may be inverted.
They will be labeled one of two ways here.
If labeled a Fifth or a Fourth, it is in reference to the interval below the first tone.
If labeled a a Fifth (inv.) or a Fourth (inv.), it is in reference to the the first tone regardless of octave.
From tonic (1st scale degree) to the Perfect Fourth degree (as in from C to F) is a total of 5 semitones.
From tonic (1st scale degree) to the Perfect Fifth degree (as in from C to G) is a total of 7 semitones.
Again, this can be tricky. They are inversions of each other so what you want to train your ear (and mind) to is not just the the difference in pitch, but the direction, and refereance tone. More than anything this is about communicating with others. If you say "a Fourth" with reference to a key such as C, it will always be an F, regardless of octave. However, if you say "a Fourth below C", you imply 5 descending semitones, which would be a G instead.
In hearing just the tones as on the quiz, there may be two correct answers, an inversion of an interval, and a descending interval. Such is the nature of all the interval inversions ...excepting the octave and tritone.
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Quiz 9
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Quiz 10
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Quiz 11
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Quiz 12
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Quiz 13
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Quiz 14
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Perfect Fourths and Fifths as a Dyads or Double Stops.
There is no mention of Descending here, as these intervals are not played in sequence.
Note also that they are in the key of C, So the F is always a Fourth and The G always a Fifth regardless of octave.
But the interval, and thus the sound that is heard, changes between the two when they are inverted. An inverted Fourth (C - G) has the interval of a Fifth (G - C) when inverted. Without reference, it is impossible to tell an inverted Fifth from a Fourth, or inverted Fourth from a Fifth.
In the third column above, note the key signatures of G and F respectively.
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Quiz 15
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Quiz 16
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Quiz 17
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Quiz 18
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Quiz 19
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Quiz 20
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Quiz 21
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Quiz 22
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Quiz 23
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Quiz 24
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Quiz 25
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