I am reading this book called "jazz keyboard harmony",
here is a snippet from the beginning pages,
I know in the case of triple flat, which you don't use in music theory, you get to use another note name like in Cb diminished 7 chord, which is Cb Ebb Gbb Bbbb, you don't say B triple flat because we don't use triple flat, you get to say like Ab in this case
but outside of triple flat situations, I thought you always have to use correct note spelling?
In this example of C diminished 7, isn't it C Eb Gb and Bbb? Because we need a "third" from G to B, but in this book it's using C Eb Gb and A? Isn't this technically incorrect?