There will, probably by the end of February 2008,
a reasonably substantial text to read on this
important topic. I have plenty in note form and have just
started writing a chapter
on the subject.
Meanwhile, you will find as much as I have had
time to write and put on line here.
Please note
that this is definitely work in progress! That very provisional text refers
frequently to a video
clip which you will find here (Vocal Persona Commutations).
You will also find sporadic references to vocal persona in the following texts: