If anyone thinks audio tests conducted by Roux are totally worthless unless they exactly replicate every single condition - I think that's naive. Roux has to raise possibilities, nothing more.
It's totally naive and it is setting an impossible set of standards and expectations to pass the test. The wind has to be blowing at the exact same speed, it has to be the exact same temperature, the dew points must be exactly the same, it has to be the exact same time of night...
The fact of the matter is if he presents audio evidence that corroborates Oscar's story, audio evidence that the state hasn't done, evidence that is perfectly scientific and at the very least compelling, then it will still be denied because it doesn't make Oscar look guilty. If Roux went to Oscar's and did the tests and everything matches up then that is very compelling evidence that the judge won't simply write off because it wasn't performed in the exact same conditions of that night. That is solid proof that Oscar's story is plausible. The problem is people just don't want to hear it. It's scary.