So to be clear, you are suggesting that an recording of someone speaking can determine whether someone else is telling the truth, correct? For example, if a certain someone claimed that a person made certain statements during a speech, but the tape did not reflect those statements being made, we could then use that to conclude that the certain someone was not accurate in their claims, correct?
And to follow your line of thinking even farther down the road, if that certain person was not accurate in their statements, that calls into question their credibility on other issues, right? Some might even call that person a liar, correct?
I'd hate to think your determination of who is telling the truth and who is lying (or your desire to hold them accountable for the same) is based on their political affiliation. So do me a favor and prove that is not the case.