Modes in terms of tetrachords

Tetrachords | Major | Minor | Phrygian | Whole-Tone

See part 1 of this tutorial here.

 

Major Tetrachord

major tetrachord is a series of four notes with the interval pattern tone – tone – semitone (2-2-b2).

modes major tetrachord

 

Minor Tetrachord

minor tetrachord is a series of four notes with the interval pattern tone – semitone – tone (2-b2-2).

modes minor tetrachord

 

Phrygian Tetrachord

phrygian tetrachord is a series of four notes with the interval pattern semitone – tone – tone (b2-2-2).

modes phrygian tetrachord

 

Whole-Tone Tetrachord

whole-tone tetrachord is a series of four notes with the interval pattern tone – tone – tone (2-2-2).

modes whole-tone tetrachord

 

Modes in terms of tetrachords

 

Ionian Scale

The Ionian Scale is a combination of two major tetrachords separated by a major second (2).

ionian scale - modes in terms of tetrachords

 

Mixolydian Scale

The Mixolydian Scale is a combination of a major tetrachord and a minor tetrachord separated by a major second (2). The upper major tetrachord of the ionian scale becomes the lower tetrachord of the mixolydian scale.

mixolydian scale - modes in terms of tetrachords

 

Dorian Scale

The Dorian Scale is a combination of two minor tetrachords separated by a major second (2). The upper minor tetrachord of the mixolydian scale becomes the lower tetrachord of the dorian scale.

dorian scale - modes in terms of tetrachords

 

Aeolian Scale

The Aeolian Scale is a combination of a minor tetrachord and a phrygian tetrachord separated by a major second (2). The upper minor tetrachord of the dorian scale becomes the lower tetrachord of the aeolian scale.

aeolian scale - modes in terms of tetrachords

 

Phrygian Scale

The Phrygian Scale is a combination of two phrygian tetrachords separated by a major second (2). The upper phrygian tetrachord of the aeolian scale becomes the lower tetrachord of the phrygian scale.

phrygian scale - modes in terms of tetrachords

 

Locrian Scale

The Locrian Scale is a combination of a phrygian tetrachord and a whole-tone tetrachord separated by a minor second (b2). The upper phrygian tetrachord of the phrygian scale becomes the lower tetrachord of the locrian scale.

locrian scale - modes in terms of tetrachords

 

Lydian Scale

The Lydian Scale is a combination of a whole-tone tetrachord and a major tetrachord separated by a minor second (b2). The upper whole-tone tetrachord of the locrian scale becomes the lower tetrachord of the lydian scale.

lydian scale - modes in terms of tetrachords

 

Ionian Scale

The Ionian Scale is a combination of two major tetrachords separated by a major second (2). The upper major tetrachord of the lydian scale becomes the lower tetrachord of the ionian scale.

ionian scale - modes in terms of tetrachords

 

And so the circle is complete.

 

Major Scale | Modes in terms of tetrachords

circle - modes in terms of tetrachords

 

 

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