What no E# ?

Thanks Noteboat,
As usual your post was highly instructional and detailed.

Interesting stuff! The evolution of music and music notation.

Thanks again
Ghost 8)

If you had a 14-tone equal tempered system as opposed to 12, it would sound weird or, at least, less stable. Your perfect 4ths, for instance, would be about 25 cents too sharp, and your perfect 5ths would be about 25 cents flat.