Phrygian Major Scale: Neoclassical, Flamenco, and Jazz Uses

Tertian harmony is the system of building chords by stacking thirds, which is the foundation of Western harmony. The four basic triads are: Major triad (root + major third + minor third); Minor triad (root + minor third + major third); Augmented triad (root + major third + major third); Diminished triad (root + minor third + minor third). Seventh chords are created by adding a third to a triad: from major triad, add major third = major 7th chord; add minor third = dominant 7th chord. From minor triad, add major third = minor major 7th chord; add minor third = minor 7th chord. Extended chords add thirds to seventh chords: 9th, 11th, and 13th chords.

Triads are three-note chords that serve as the foundation for understanding seventh chords. A triad consists of the root (1st degree), third (3rd degree), and fifth (5th degree). There are three main types: Major triad (1-3-5), Minor triad (1-♭3-5), and Diminished triad (1-♭3-♭5). Major 7th and Dominant 7th chords are built from Major triads by adding the major seventh (1 semitone below octave) or flat seventh respectively. Minor 7th and Half-Diminished chords are built from Minor triads by adding the flat seventh. Understanding triads prevents seventh chord learning from becoming mere memorization without understanding the underlying musical structure.

To build triads from a scale, take every other note (1-3-5). Major triads use: Root + 2 + 1/2. Minor triads use: Root + 1/2 + 2. For C major: C-E-G (major), D-F-A (minor), E-G-B (minor), F-A-C (major), G-B-D (major), A-C-E (minor), B-D-F (diminished). Seventh chords add tension: Major seventh (1-3-5-7), Minor seventh (1-Flat3-5-Flat7), Dominant seventh (1-3-5-Flat7), Half-diminished seventh (1-Flat3-Flat5-Flat7). The dominant chord (5th degree) creates tension that resolves to the tonic.

A powerful guitar technique where you can play a major triad over any dominant 7th chord (such as A7, D7, or E7) by taking the major triad of the chord and moving it down one whole step (two frets). For example, playing a G major triad over an A7 chord creates an A11 sound, and playing a C major triad over a D7 chord creates a D11 sound. This technique works with any inversion of the triad and can be combined with blues scales or used for rhythm guitar comping to create rich dominant sounds with 11th intervals.

Triads are three-note chords built from interval combinations: major (3+2), minor (2+3), augmented (3+3), and diminished (2+2). Chord symbols use letters (C), capital M (major), lowercase m (minor), + (augmented), and ° (diminished). Seventh chords extend triads by adding seventh intervals: major seventh (3+2+3), dominant seventh (3+2+2), minor seventh (2+2+2), minor major seventh (2+2+3), half-diminished (2+2+2+2), diminished (2+2+2+3), and augmented seventh (3+3+2). Each type has distinct symbols and sonic characteristics.

The major scale (Ionian mode) has seven notes with scale degrees 1-7, serving as a reference for all other scales. The natural minor scale (Aeolian mode) differs with flat 3, flat 6, and flat 7. The Phrygian mode (third mode of major scale) has scale degrees 1, flat 2, flat 3, 4, flat 6, and flat 7. The only difference between natural minor and Phrygian is the flat second note, which gives Phrygian its distinctive dark, intense sound. Basic chords are triads (three-note chords) constructed by taking a note, skipping one, then skipping another. For C Phrygian: C minor (1), D flat major (2), E flat major (3), F minor (4), G diminished (5), A flat major (6), B flat minor (7).

The Aeolian mode (natural minor scale) is the sixth mode of the major scale, created by flattening the third, sixth, and seventh notes (e.g., E, A, B to Eb, Ab, Bb in C Aeolian). It works over minor chords except those with a natural sixth. The Phrygian mode is the third mode, created by flattening the second, third, sixth, and seventh notes (e.g., D, E, A, B to Db, Eb, Ab, Bb in C Phrygian), producing a Middle Eastern sound. Both work over specific chord progressions including C minor to F minor to Db major.

The Phrygian mode has the scale degrees: 1, flat 2, flat 3, 4, 5, flat 6, flat 7. It is essentially the natural minor scale with a flat 2nd degree instead of a natural 2nd. This single alteration creates the distinctive exotic sound associated with Phrygian. In F Phrygian, the notes are F, Gb, Ab, Bb, C, Db, Eb. The flat 2nd creates tension that resolves nicely to the root, making it popular in metal and progressive music.

This segment covers the theoretical foundation of the lesson. The song uses C-sharp natural minor scale with additions from the full minor blues scale (flat fifth/diminished fifth interval) and Phrygian mode (flat second). The diminished fifth interval creates the signature 'doom' sound when sustained. The flat second adds tension to natural minor runs. These modal and scale elements combine to create the distinctive heavy metal/doom metal sound associated with Black Sabbath, demonstrating how scale manipulation creates genre-specific tonal characteristics.

The Phrygian mode is the third Greek mode, equivalent to a major scale starting from its third note. For example, starting C major from E produces E Phrygian: E-F#-G-A-B-C-D. Structurally, it contains: root, minor ninth, minor third, perfect eleventh, perfect fifth, minor sixth, and minor seventh. The key difference from natural minor is the minor ninth (e.g., A natural minor becomes A Phrygian by changing B to Bb). This single note creates tension and instability, making Phrygian less common than modes like Dorian or Lydian. To use Phrygian on a minor chord, find the major scale where that chord is the third degree (shortcut: go down two whole tones from the minor chord).

This section explains how to analyze chord progressions using Roman numerals, a universal system for describing harmonic relationships. In any major key, seven diatonic chords exist: I, IV, V are major; ii, iii, vi are minor; vii° is diminished. For example, in C major: C (I), F (IV), G (V) are major; Dm (ii), Em (iii), Am (vi) are minor; Bdim (vii°) is diminished. This system allows musicians to describe progressions like 'I-VI-IV-V' universally across all keys. The video demonstrates this with Tom Petty's 'Learning to Fly,' showing how F-C-Am-G progression translates to IV-I-vi-V in C major. Understanding this framework enables meaningful musical discussions and deeper appreciation of song structures.

This comprehensive lesson covers four diatonic chord progressions less commonly used in popular music. The She Loves You progression (I-6-3-5) uses the third chord, which is less frequent in progressions, giving it distinctive character. The Starlight progression (I-2-6-4) replaces the five chord with a two chord in the classic 5-6-4 pattern. The Jolene progression (i-3-7-1 in minor) creates clear cadence by returning to home. The Polly progression (i-3-7-6 in minor) differs by ending on the six chord. The lesson also covers two approaches to Roman numeral analysis in minor keys: relating to the major scale with flat symbols, or relating directly to the minor key. The practical approach for chord charts is to use Roman numerals relative to the major scale regardless of tonality, avoiding ambiguity when songs modulate between major and minor keys.

Roman numerals represent chord qualities in a progression: uppercase (I, IV, V) indicates major chords, lowercase (ii, iii, vi) indicates minor chords, and vii° indicates diminished. This system allows musicians to communicate chord progressions without specifying the key.

Chord progressions are patterns of chords used in songs. The same progression sounds the same regardless of key because it represents the same relationships between scale degrees. Chords in a progression can be labeled using Roman numerals: uppercase indicates major chords, lowercase indicates minor chords. For example, the progression C-G-Am-F can be analyzed as I-V-vi-IV. This abstraction allows musicians to recognize and analyze chord patterns across different keys and compositions.

Roman numeral analysis describes chord progressions in relation to the key using Roman numerals (I, ii, iii, IV, V, vi, vii°). This system allows musicians to think about chord relationships abstractly, recognizing that progressions like I-IV-VI-VI will sound similar regardless of the specific key. This analytical approach is particularly valuable for understanding functional harmony and chord relationships across different tonal centers.