While reading up on four-way close voicing (part of Evan Rogers' Big Band Arranging series), I have encountered something I cannot quite understand, so maybe there is a typo in the article?
The picture below is four-way close voicing; the green notes are approach notes:
With regards to the second chord under which "DOM." is written, I first thought it was B D F Ab (B fully diminished chord) without knowing it was dominant function, resolving to C/A.
After seeing the "DOM." written under it, I presumed the author meant a rootless G7(b9), Ab B D F. But as you can see above the author adds an explanation beneath "I substitute the root of the chord (E) for the b9 (F) ..." implying it is rootless E7(b9). Is this a typo or have I not yet understood it properly?
And with regards to the fourth chord under which "DIM." written, in order to be a fully diminished chord, A has to be Ab, forming B D F Ab. I also wonder why A is sustained?