There really is no case against him, and everybody knows it.
The thing is that if she rules out these audio experts, I think she can also rule out the ones that supported Zimmerman. So who knows where this is going to go?
I was reading that there was at least one witness who heard Zimmerman screaming for help. "Audio expert" versus witness on the scene means "expert" loses.
she DID NOT rule out the defense experts and therefore their testimony can be used to refute the validity of anyone claiming to be able to determine the ‘screamer’.
At least with Zimmerman, they have a person that they can test with. Maybe an opportunity to say it is or may not be Zim.
They could record him over the same equipment or same type of equipment and drop a live squirrel in his britches. Maybe, that might come close to the elevated pitch you get when you are terrified.