Romanian major scale

The Romanian major scale is a heptatonic scale subset of the octatonic scale with an omitted ♭3 degree. It is noted for its flattened 2nd and sharpened fourth degrees, the latter a distinctive feature of Romanian traditional music. It has the following interval structure in semitones: 1, 3, 2, 1, 2, 1, 2, giving it the notes C, D♭, E, F♯, G, A, B♭ in the key of C. Though it is called a major scale, it is typically played over a C13 (♭9) (♯11) (also F♯ major over C) dominant chord. This is an enharmonic mode of B Harmonic Minor (A# & C# in B Harmonic Minor, Bb & Db in C Romanian Major), along with D Harmonic Major (C# in G Harmonic Major, Db in C Romanian Major). The root note of F Harmonic Major is raised a semitone to F#, and the root note of D Aeolian Dominant lowered a semitone to Db. There is also a ♮6 with the Db Super Lydian Augmented scale, lowering the B♮ to Bb.

As the Romanian major scale is a subset of the octatonic scale with no ♭3, it should have diminished seventh chords, particularly from its second note. This scale's ♯4th and 6th notes have minor or major (dominant) chord, while the root only has a major (dominant) chord (distinction from the half-whole diminished scale that the root, ♭3rd, ♯4th, and 6th notes have full diminished, half diminished, minor, and dominant chords built from that scale).

The 5th mode, Jazz minor flat 5, also known as Jeth's Mode, is a jazz minor or melodic minor scale with a flattened 5th, and is named after Dutch composer Willem Jeths. It can also be thought of as a whole half diminished scale omitting the augmented fifth. It can be used for soloing instead of regular jazz minor. The Jazz minor flat 5 mode in C contains the notes C, D, E♭, F, G ♭, A, B, which has the formula 1, 2, ♭3, 4, ♭5, 6, 7. This is an enharmonic mode of E Harmonic Minor (D# & F# in E Harmonic Minor, Eb & Gb in C Jeth's Mode), along with G Harmonic Major (F# in G Harmonic Major, Gb in C Jeth's Mode). The root note of Bb Harmonic Major is raised a semitone to B♮, and the root note of G Aeolian Dominant lowered a semitone to Gb. There is also a ♮6 with the Gb Super Lydian Augmented scale, lowering the E♮ to Eb.

Modes
The scale contains the following modes:


 * {| class="wikitable"

! align="center" | Mode ! align="center" | Name of scale ! colspan="8" align="center" | Degrees ! colspan="8" |Notes (in C Romanian Major) !Chords Nohkan #2 D♭mM7♭5 Altered Dominant 𝄫6/Blues Phrygian ♭4 (Jeth's Mode)
 * align="center" | 1
 * Romanian Major Scale ||  1 || ♭2 || 3 || ♯4 || 5 || 6 || ♭7 || 8
 * C
 * D♭
 * E
 * F♯
 * G
 * A
 * B♭
 * C
 * C(7,♭9,#11,13)
 * align="center" | 2
 * Super Lydian Augmented ♮6/
 * align="center" | 2
 * Super Lydian Augmented ♮6/
 * 1 || ♯2 || ♯3 || ♯4 || ♯5 || 6 || 7 || 8
 * D♭
 * E
 * F♯
 * G
 * A
 * B♭
 * C
 * D♭
 * D♭dim7 or
 * align="center" | 3
 * Locrian ♮2𝄫7 ||  1 || 2 || ♭3 || 4 || ♭5 || ♭6 || 𝄫7 || 8
 * E
 * F♯
 * G
 * A
 * B♭
 * C
 * D♭
 * E
 * Edim7
 * align="center" | 4
 * Istrian [heptatonic]/
 * align="center" | 4
 * Istrian [heptatonic]/
 * 1 ||  ♭2 || ♭3 || ♭4 || ♭5 || 𝄫6 || ♭7 || 8
 * F♯
 * G
 * A
 * B♭
 * C
 * D♭
 * E
 * F♯
 * F♯m or F♯(7,♭9, ♯9, ♯11)
 * align="center" | 5
 * Jazz Minor ♭5
 * Jazz Minor ♭5
 * 1 || 2 || ♭3 || 4 || ♭5 || 6 || 7 || 8
 * G
 * A
 * B♭
 * C
 * D♭
 * E
 * F♯
 * G
 * Gdim7 or

GmM7♭5 Superphrygian ♮6
 * align="center" | 6
 * Javanese ♭4/
 * Javanese ♭4/
 * 1 || ♭2 || ♭3 || ♭4 || 5 || 6 || ♭7 || 8
 * A
 * B♭
 * C
 * D♭
 * E
 * F♯
 * G
 * A
 * Am or A(7,♭9,♯9,13)
 * align="center" | 7
 * Lydian Augmented ♭3 ||  1 || 2 || ♭3|| ♯4 || ♯5 || 6 || 7 || 8
 * B♭
 * C
 * D♭
 * E
 * F♯
 * G
 * A
 * B♭
 * B♭dim7 or
 * B♭dim7 or

B♭mM7♭5
 * }