Vocal fry is pretty useless. I know Brett Manning tries to emphasize vocal fry in particular, but all that's gonna do in the long run is make you squeeze for notes.
With this program the exercises are simple and apply directly to singing. That's what I love about it. Vocal fry is an effect that can be used after your technique is spot on.
Before I started your method, I was able to make great use of vocal fry by using it before phrases in my upper range. With that technique I was able to strengthen my high notes and belt safely into the fifth octave, but I now find open throat is much more efficient.
It is that croaky type sound done by using the edges of the vocal cords I believe. You can achieve it by dropping the volume of a comfortable note until you hear that rattle or croak of the cords. I use it for effect but sparingly. It doesn't seem to do any harm its just note that useful as you move up in range.
Comments
Ken does not utilize vocal fry in any of his exercises.
All of the comments I have heard from Ken regarding vocal fry dismiss its usefulness.
Bob