There is much "chatter" about the likely Defence evidence of a recording of OP Screaming.
People seem to miss the point (surprise). Such a demonstration (if it happens) is not going to be PROOF that OP sounds exactly like a woman, that he does a good job of "female scream impersonation", but rather just a demonstration that OP's voice can produce just the same sort of sound as a woman screaming. The demonstration should be about the person HEARING the sounds more so than OP's skills as a female impersonator. People can, and often do, make mistakes in what they perceive sounds (and sights) to be.
I see further chatter claiming that Roux should have played the recording of OP screaming to the two couples who are the only State ear witnesses who heard "a woman screams". That of course would be a very UN scientific test.. and in fact a bit silly and futile. Of course the Burgers and Stipps are convinced they heard a woman (Reeva) scream, and so we KNOW for certain before anybody plays them an ID recording that their answer would be "NO". A scientific (psychological) test of this type requires that test subjects are unaware. Such a audio "ID parade" would be analogous to asking a witness to ID an offender in a normal line up... when they BELIEVE the offender is dead and so is definitely NOT in the line up. Or perhaps showing the witness a photo that they are already convinced is not the offender and asking them if it is the offender. It makes no sense.
Any sort of audio ID test would be difficult and take a lot of time and effort to prepare and run. I have suggested recording a large number of different people screaming (under conditions and over some distance appropriate in this case) and then playing those recordings to witnesses and asking them to identify which were male and which were female. It would be interesting to see the results. My prediction is that such a test would show that a statistically significant number of people make mistakes in identifying Gender.
Such a test could well become a bit of a "circus" if tried in court. It would be just as well to do such a test, in advance with volunteers as test subjects tasked with identifying screams. I wonder if Roux has done that?
I am not aware of such a test having been done, in the Psychology Scientific literature... I have not looked

But I KNOW that psychology experiments abound showing the limitations of human perception, and how easily people can be "fooled" in their perceptions. It may well be that there are already studies done that are relevant to this case situation, and documented in reputable Psychology Scientific Journals. Who knows? Roux could perhaps present an expert in the form of a Psychologist who can testify to the limitations of human perception.