Notation
The basic concept of George's simplified music notation is that players should be able to play what they see, without having to adapt for key signature or complex accidentals.
The traditional sharp and flat symbols in the key signature are replaced by the sharp and flat noteheads of simplified music notation: a triangle for sharps and a rhombus for flats. The traditional oval notehead is used when a note is natural.
If there is a key change in the middle of a piece, the new key signature is shown without naturals to ‘neutralise’ the previous key. The exception to this is where the key changes to C major or A minor, where ‘neutralising’ naturals are used to make this clear. Instead of the traditional natural symbol, an oval notehead is used.
Double sharps, and double flats (and optionally B and E sharp, and F and C flat) are enharmonically transposed, and preceded by a symbol called a history sign. History signs allow anybody studying the music to see how it was originally written and to analyse the harmonic progression of the piece. However, they can be ignored whilst sight-reading.
Read more about this topic: Simplified Music Notation