Re: Inversions of 7o and 5+, etc

"SleepyHead" <simonharpham@[EMAIL PROTECTED]
> wrote in message 
news:9d8d688c-777f-4847-9875-857dba2bd66c@[EMAIL PROTECTED]
 27 Mar, 02:07, "Tom K." <tkor...@[EMAIL PROTECTED]
> wrote:
> "Alain Naigeon" <anaig...@[EMAIL PROTECTED]
> wrote in message
>
> news:47eae637$0$13930$426a74cc@[EMAIL PROTECTED]
>
>
>
> It's the 2,3,4 and 6 semitone intervals which form symmetrical
structures.

Right idea, execution slightly off. Here's a corrected version:

Min. 2 forms the chromatic scale - 1 semitone, 12 possibilities (12 /
1 = 12)
Maj. 2 forms the whole-tone scale - 2 semitones, 6 possibilities -
(12 / 2 = 6)
Min. 3/Aug. 2 forms the o7 - 3 semitones, 4 possibilities - (12 / 3 =
4)
Maj. 3 forms the Aug. triad - 4 semitones, 3 possibilities - (12 / 4 =
3)
Aug. 4/Dim.5 forms the tritone - 6 semitones, 2 possibilities - (12 /
6 = 2)
Octave - 12 semitones, 1 possibility (12 / 12 = 1)

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True, Simon - but since the 1 semitone chromatic scale has only one 
(non-transposable) form, and the octave contains only one pitch class, I 
don't see them as providing similar musical possibilities to the others.

Tom K.