Although I do now understand the reasoning behind the decisions made about the spelling of Em7sus4 on the part of the authors of harmonizer because it looks like they moved the minor third ( G ) up an octave, getting it out of the way of the perfect fourth ( A ), while preserving the minor quality of the chord. The part I dont understand is why they dropped the perfect fifth.
A scale degree of a Major scale ( ie. an interval name ) must be flattened twice ( by two semitones ) to become diminished or once ( by one semitone ) to become minor...sharpened by one semitone to become augmented.
EDIT : However, the perfect intervals ( perfect unison P1, perfect 4th P4, perfect 5th P5, perfect octave P8, perfect 11th P11, perfect 12th P12, perfect 15th P15 ) can only be flattened or sharpened by one semitone to become diminished or augmented...a perfect interval flattened by one semitone = diminished ( not minor )...A perfect interval sharpened by one semitone = augmented.
I would like to reiterate that chords are not named after functions but after the scale degrees of the root notes Major scale. The root note of the chord may not be the lowest note in the chord if the chord is an inversion.
I found out a bit about minor scale functions today ( from 'computer music' magazine ).
They are different to Major scale functions :
Harmonic Function in minor Keys :
i - minor
ii - diminished
III - Major
iv - minor
V - Major
VI - Major
VII - Major
i, III and VI have tonic function.
iv, ii and sometimes VI have subdominant function.
V and VII have dominant function.
Qualities of Functions in General :
( quoted from Dave Clews of computer music magazine, issue 258, page 74 )
The tonic function represents a feeling of 'home' or 'rest'.
The tonic is the natural end point that all chords are leading back towards.
The I chords function is shared although to a lesser extent by the iii chords and the vi chords.
The dominant function is about tension and forward motion.
Dominant chords have a natural tendency to want to resolve or pull back to the tonic, creating a sense of relief from the tension.
Chords that have a dominant function include the V and vii chords.
The subdominant function bridges the gap between the tonic and the dominant chords.
The IV, ii and sometimes the vi chords can all have subdominant function.
Can anyone help me explain the diminished ( whole-half ) scales functions?
Edited by lettuce, 21 June 2018 - 17:39.