"the 911 operator who took that call thought there may have been something at the end of the conversation"

Looks like that kills the theory that the 3rd voice on the tape came from a used tape. The 911 operator would have been listening to the call in REAL TIME, not a recording.

Of course we knew all along the "used tape theory" was just spin. If the 3rd voice was from a previous recording, that anomaly would have occurred throughout the ENTIRE tape--not just in the few closing seconds of the Ramsey phone call.
Bleed-over from any previous recording(s) would have been blatantly obvious from Day-1.

Let's hope Lin Wood releases a HIGH quality copy of the 911 tape, and doesn't try to pull the wool over the public's eyes by sticking a deteriorated/old-generation piece of garbage out there. It sounds like that is exactly what Barrie Hartman was listening to--if he didn't notice the questionable sounds at the end of the tape that even the DA's people couldn't refute the existence of.