For some reason, the Audio Unlockables feature seems to be bugged in RTTS. I'm hearing my selected calls when the opposing team, not mine, hits a home run, and I'm not hearing the stadium sounds at the right time (I once heard one, again, for the opposing team getting one of the final 3 outs).

It's occuring in Double-A, at least. I'm not sure if this glitch affects the higher levels, particularly the Big Leagues.