Some of you at one point or another may have wondered if my choice of key signature for my piano sonatas follows any kind of pattern. In fact, the first 50 of my piano sonatas already have their keys determined. I thought I'd take a minute to explain some of the patterns involved.

Here are the keys of my first 50 piano sonatas, in order (in minor unless specified):
E Bb D G# C F# B F A Eb G C#
F B D# A C# G Bb E G# D F# C
C major
C# G Eb A F# C G# D Bb E B F
C F# D G# E Bb F B G C# A Eb
Eb major

Aside from the C major sonata and the Eb major sonata, it would seem pretty random right? Well, not as much if you compare the even numbered sonatas to the odd numbered sonatas:

Odd : E D C B A G F D# C# Bb G# F# CM G A C D E F F# G# Bb B C# Eb

Even: Bb G# F# F Eb C# B A G E D C C# Eb F# G# Bb B C D E F G A EbM

So here are a few things to notice:
1. In the case of sonatas 1-12, 13-24, 26-47, and 48-59, all twelve keys are used distinctly with no repeats, and in a different pattern each time.
2. The odd numbered sonatas follow a descending phrygian scale at first, and later an ascending mixolydian scale with the b skipped.
3. The even numbered sonatas eventually follow a descending locrian scale with the f removed, and later a complete ascending locrian scale.
4. For sonatas 1-24, the even numbered sonata is always exactly a tritone above each previous odd numbered sonata.
5. For sonatas 26-49, the odd numbered sonata is always exactly a tritone above each previous even numbered sonata.

There are more patterns in there too. I just wanted you guys to know I'm not going about this haphazardly. In fact, I'm actually going about it rather obsessively.

Oh and do be sure to check out my latest one, the sixth: http://www.furaffinity.net/view/8552750/