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Tetrachords: Lydian (1 2 3 #4)
Updated: 12 Jan 2014
Traditionally, a tetrachord is a series of four tones filling in the interval of a perfect fourth. In modern usage a tetrachord is any four-note segment of a scale or tone row including the augmented fourth (+4). The term tetrachord derives from ancient Greek music theory, it literally means four strings.

Tetrachords: Major (1 2 3 4)
Updated: 13 Feb 2020
Traditionally, a tetrachord is a series of four tones filling in the interval of a perfect fourth. In modern usage a tetrachord is any four-note segment of a scale or tone row including the augmented fourth (+4). The term tetrachord derives from ancient Greek music theory, it literally means four strings.

Exploring Improvisation on `Ukulele Using Tetrachords
Updated: 12 Jan 2014
Traditionally, a "Tetrachord" is a series of four tones filling in the interval of a perfect fourth. In modern usage a tetrachord is any four-note segment of a scale or tone row including the augmented fourth (+4). The term tetrachord derives from ancient Greek music theory, it literally means four strings.

Tetrachords: Phrygian Major ( 1 b2 b3 4 )
Updated: 12 Jan 2014
Traditionally, a tetrachord is a series of four tones filling in the interval of a perfect fourth. In modern usage a tetrachord is any four-note segment of a scale or tone row including the augmented fourth (+4). The term tetrachord derives from ancient Greek music theory, it literally means four strings.