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If you want to receive guitar lessons you can contact me through the email [email protected] The sixth is the interval of six degrees between two notes of the musical scale. There are different types of sixths: Diminished: they occur when there are three tones and a semitone of distance between the two notes. Diminished sixths have the same tonal length as perfect fifths. Minor: they occur when there are four tones of distance between the two notes. Minor sixths have the same tonal length as augmented fifths. Major: they occur when there are four tones and a semitone of distance between the two notes. Major sixths have the same tonal length as diminished sevenths. Augmented: they occur when there are five tones of distance between the two notes. Augmented sixths have the same tonal length as minor sevenths. The minor sixth corresponds to the frequency ratio 8:5, while the major sixth corresponds to the ratio 5:3.