PentaReg / PentaPhryg (blues minor) — a Reg tonality and regular basic pentatonality
Tonalibus 2f-8 penta – 2021-09 – 10
Tonalibus 2f-8 penta – 2021-09 – 11
Tonalibus 2f-8 penta – 2021-09 – 12
Tonalibus 2f-8 penta – 2021-09 – 13
Tonalibus 2f-8 penta – 2021-09 – 14
Scale and sound samples
- Pentatonality matrix: The octave of a regular pentatonality includes two Reach steps, three whole steps, and no half step (or semitone). One or two consecutive whole steps frame and separate the two Reach steps. A clustered pentatonality has two consecutive Reach steps and three consecutive whole steps. Some further basic pentatonalities contain three Reach steps, at least two of them consecutive. And extended pentatonalities include a double whole step plus one or two Reach steps.
- PentaReg / PentaPhryg: Both names indicate that this is a pentatonality. The first name indicates that this is a Reg(ressive) tonality without quint and the common root of Locrian, Phrygian, and Aeolian. The second name indicates that this pentatonality corresponds to Phrygian, without the minor second or quint. It also corresponds to Locrian without the minor second or tritone, or to Aeolian without the major second or quint. Thus, as Reg tonality without its quint, it embraces the minor tonalities. PentaReg / PentaPhryg is also known as blues minor.
- Step pattern: Ascending from the fundamental (tonic or Do), a Reach step leads to a whole step. Then comes another Reach step. Finally a pair of consecutive whole steps leads up to the octave.
- Scale intervals: Minor third, quart, minor sixth, and minor seventh.
- Tetra- and trichords: The lower and upper tetra- or trichord are both PentaLo.
- Harmonic axes: There is no axis.
- Primary harmonic anchors: The fundamental or North anchor is partially present with its head and only its left leg. The East anchor is complete. The contrast or South and the West anchor are completely absent.
- Secondary harmonic anchors: Two secondary anchors are present, SE and WN. Both emphasize the fundamental North anchor, the quart, and the East anchor, one more the North, the other the East.
- Piano keyboard reference: PentaReg / PentaPhryg corresponds to the black keys with A# as fundamental.