Now, these five particular notes are chosen out of a possible twelve (as the octave is decomposed into 12 notes in 12-TET). The notes may be at least a whole step apart from each other, or there may be at least one pair of notes that are just a half step away (e.g. C and C#). This produces the hemitonic and anhemitonic pentatonic scales.
- Hemitonic Pentatonic Scales: (5 note-scales containing ½ steps intervals)
- Anhemitonic Pentatonic Scales: (5 note-scales that do not contain a pair(s) of notes ½ step apart)
Again, a pentatonic scale may be either a major, minor, suspended, etc.
- Major Pentatonic : Scale constructed by five consecutive pitches from the circle of fifth, rearranged into one octave. E.g. C major pentatonic scale is composed of the notes "C, D, E, G, A." Its structure is 2-2-3-2-3
- Minor Pentatonic: Scale constructed using the 1st, 3rd, 4th, 5th, and 7th notes of a natural minor scale. E.g. C minor pentatonic scale is composed of the notes, "C, Eb, F, G, Bb." Its structure is 3-2-2-3-2
- Suspended Pentatonic: It is composed by writing out the major pentatonic of the note a whole tone below the required one, and choosing five consecutive notes from the 2nd note of the major pentatonic. Its structure is 2-3-2-3-2-3 E.g. C suspended pentatonic can be formed by choosing five notes from second onwards in the Bb major pentatonic (Bb, C, D, F, G, Bb) as C, D, F, G, Bb.
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