Pentatonic Scales are scales that have 5 notes in an octave, unlike heptatonic which has 7 notes in an octave. Many types of songs contain the pentatonic scales such as Celtic Folk Music, Hungarian folk music, West African music, African-American spirituals, Jazz, Blues, Rock, and even Children song. Pentatonic scales can be divided to hemitonic and anhemitonic. Hemitonic pentatonic scales contain one or more semitones like flats and sharps. However anhemitonic pentatonic scales don't contain semitones. Most hemitonic scales are minors and they can be easily found in North and West African music. Most of anhemitonic scales are major scales. Other than that there are much more pentatonic scales such as Egyptian, blue mayor, blues minor, and Pythagorean diatonic.
Source-Wikipedia. "Pentatonic Scale." Wikipedia. N.p., n.d. Web. 1 Dec. 2011.
<http://en.wikipedia.org/wiki/Pentatonic_scale>.
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