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MAJOR SCALE
CONTENT- Tetrachord
- Tones and Semitones
Tetrachord
Tetrachord is an equal division of a major scale. The diatonic major scale with its eight notes can be divided into two equal parts, each containing four notes, e.g. C D E F G A B C. When divided into two halves, C D E F into one group and G A B C into another group. Each group of four notes is called TETRACHORDS. The first half is known as lower tetrachord [L T], while the second half the upper tetrachord [UT]. Thus in the above example C to F becomes the lower tetrachord [C D E F] and G to C [G A B C] is the upper tetrachord. Major scales contain five tones and two semitones, it therefore means that each tetrachord has two tones and one semitone. For example, C to D is a tone while D to E is a semitone.[L T]. S similarly G to A is a tone, and B to C is a semitone.You are viewing an excerpt of this lesson. Subscribing to the subject will give you access to the following:
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