Overview

Pope Gregory “the Great”

• Collector of sacred chants
• “Gregorian” chant

Modes are scales, but not all scales are modes.

A mode tonicizes a note other than the tonic.

Modes of Major

Modes of major are named after Ancient Greek city states:

1st mode: Ionian
2nd mode: Dorian
3rd mode: Phrygian
4th mode: Lydian
5th mode: Mixolydian
6th mode: Aeolian
7th mode: Locrian

Modes are ALWAYS named by the letter that they start on.

Tetrachord Formulas

Describing Scale Relationships

Relative Scales

• Share the same key signature
• The key is the “relative” of both scales

Parallel Scales

• Share the same starting pitch

---

Solving Scales

Naming a given written scale

Using relative relationships:

Using tetrascale ID:

Spelling a given scale

Using tetrascales:

Using relative relationships:

Using parallel relationships: