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Tuesday, February 2, 2016

35. Two-notes power chords . Major, Minor, and neutral power chords. Their special role in harmony. Improvisation method based on power-chords for relaxation and meditation music.

R5 chords do not have the attribute or quality of minor or major. 
The R5 chords have the highest harmonic score among all 3-notes chords within an octave (see post 40 )

Instruments design based on R5 chords is e.g. the 3-string Greek Buzuki (D, A, D), Tzuras, Baglamas etc. or 3-string ancient Sumerian instruments.


Interval-Chords or 2-notes-chords  are of the type an-b-a(n+1) , where an is a note and a(n+1) is the same note one octave higher, and the interval an-b is one of the intervals that occurs in the major, minor, diminished, augmented and  maj7, dominant7 chords. Therefore the interval an-b would be minor or major 3rd (3 or 4 semitones) in which case the interval-chord is denote by R3m, R3 respectively (where R is the root note) , or an-b would be a 4th or 5th interval (5 or 7 semitones) thus an R5m or R5 chord (actually the R5m is an inversion of R5), or an-b would be a minor or major 7nth interval (8 or 9 semitones) in which case we may denote it by R77, or R7maj7, so as not to confuse them with the standard notation of dominant 7nth R7 and major7nth Rmaj7 chords. Such interval chords are used to derive melodies from a chord progression (see posts 69, 68).

Such chords allow more freedom to melody that they accompany compared to 3-note chord. 

Improvisation method based on power-chords for relaxation and meditation music.

(See also post 93)

Within the current improvisation method of random melodies with high harmonic statistical profile as in post 93, is the improvisation method for relaxing and meditation based of power-chords . This is mainly alternating a power chord of interval of 5th/4th with a power chord of interval 3rd/6th, or in general alternating a power chord of interval 5th/4th with any 3 notes which are chords or not. The next videos describe it for the case of a Celtic harp.