ry challenges and because he found no racial discrimination, our task is a simple one. We have previously held, “[t]aking our cue from Batson’s repeated analogies to Title VII jurisprudence,” that where the record contains an explanation for the government’s peremptory challenges, “we will review only the district court’s finding of discrimination vel non.” United States v. Forbes, 816 F.2d 1006, 1010 (5th Cir.1987) (citations omitted). In addition, we have observed that the Supreme Court suggested in Batson, again by reference to a Title VII case, that the district court’s ultimate finding should be reviewed under “either a ‘clearly erroneous’ or ‘great deference’ standard.” Id. at 1010; see also United States v. Williams, 822 F.2d 512, 515 (5th Cir.1987). This case illustrates the wisdom of deferential review.
Love’s argument, in essence, is that the prosecutor provided an incredible explanation and that the trial judge erred by accepting it as true. On the record before us, however, we find no basis to disturb the trial judge’s decision. Although the prosecutor may have accepted a white juror with some characteristics similar to the black persons he rejected, the prosecutor also gave reasons for his selection that we are unable to evaluate, such as eye contact and demeanor. Moreover, the vagarious process of choosing jurors need not be controlled by a simple equation; it may be influenced by intuitive assumptions that are not fatally suspect merely because they are not quantifiable, see Forbes, 816 F.2d at 1010-11, and by the interplay of various factors, see United States v. Lewis, 837 F.2d 415, 417 n. 5 (9th Cir.1988). Here, the trial judge personally observed the proceedings and found that the prosecutor’s explanation for striking two black members of the venire was not a pretext for racial discrimination. We must accept the judge’s credibility choice and affirm his finding on these facts.
B. The Informant’s Tape Recordings
Lance contends that the trial judge erred by admitting into evidence tape recordings made by a co-conspirator acting as the government’s informant, George Pettitt (“Pettitt”). At trial, Lance challenged the authenticity of the tapes, and he now maintains, relying on a test enunciated by the Eighth Circuit in United States v. McMillan, 508 F.2d 101 (8th Cir.1975), that the government did not adequately authenticate the tapes by satisfying the necessary preconditions to admissibility. Our response to Lance’s argument, however, may be briefly stated. First, Lance overlooks that we have expressly rejected McMillan’s, rigid test. See United States v. Floyd, 681 F.2d 265, 266 (5th Cir.1982); United States v. Anderton, 679 F.2d 1199, 1202 (5th Cir.1982). Second, we do not require conclusive proof of authenticity before allowing the admission of disputed evidence, and we perceive no abuse of the trial judge’s discretion in this case. See United States v. Patella, 846 F.2d 977, 981 (5th Cir.1988); United States v. Jardina, 747 F.2d 945, 950-51 (5th Cir.1984), cert. denied, 470 U.S. 1058, 105 S.Ct. 1773, 84 L.Ed.2d 833 (1985).
The Federal Rules of Evidence provide that the requirement of authentication or identification “is satisfied by evidence sufficient to support a finding that the matter in question is what its proponent claims.” Fed.R.Evid. 901(a). To illustrate acceptable means of authenticating evidence, Rule 901(b) lists testimony of a witness with knowledge and, for identifying a voice, an “opinion based upon hearing the voice at any time under circumstances connecting it with the alleged speaker.” See id. at 901(b)(1), (5). Under these liberal rules, the government’s tapes were adequately authenticated to be admissible. Pettitt and the law enforcement agents who participated in the taped conversations testified that, according to their memories, the audio and video tapes contained accurate recordings of the conversations that occurred. Pettitt identified the Lances’ voices, testifying that he knew them well. Counsel for all three defendants conducted voir dire examination of Pettitt concerning his method for tape recording and identifying the conversations, and counsel thoroughly cross-examined the witnesses who testified concerning the authenticity of the