Quote:
Originally Posted by Alphavictim
Man, I was never goot at that stuff. But D IS within the boundaries of Cm, so why is the note a semitone above perceived as a diminished E, which is NOT part of the Cm scale?
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Haha actually the answer lies exactly in your question!
In a way we always consider that there are only 7 notes (and not 12), and the other five are just "variations" of those seven.
So each major or minor scale (bar the pentatonics which by definition have just 5 notes) must have exactly one "variant" of each of the notes A,B,C,D,E,F,G.
The natural A minor scale has exactly these notes. So does the C major scale.
The notes of the natural C minor scale are C,D,Eb,F,G,Ab,Bb.
It could not have been D AND D# cause you are only allowed to have one variant of D in the scale. Actually, you MUST have exactly one variant of each note in the scale.