From: Brian Candler <b.candler@...>
Date: 2010-03-08T23:17:56+09:00
Subject: Re: Music Theory (#229)

And just to clarify what I mean by 'spelling', I mean the sequence of 
letters and accidentals which make a scale. On a 7-note scale each scale 
corresponds to the next letter.

Example: G# major

Correct spelling: G# A# B# C# D# E# Fx

(Fx = F double-sharp)

It would be wrong to write something like: G# A# C C# D# F G
because of the gaps and duplications of letters.

This is the reason why a C7 chord is C E G Bb not C E G A#. It's because 
the associated scale is
C D E F G A Bb

This scale is called the 'Mixolydian mode' (named by the ancient Greeks, 
I believe). It also happens to be the notes of F major with a different 
starting point, so fortunately you can re-use your major scale finger 
patterns :-)

Regards,

Brian.
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