I do have the same questions but haven't been able to come up with good answers, either.
Almost seems that those "tapes" have some voice recognition chip inside or something like that. There are strange things going on in this epsode.
And considering the multitude of Chinese names in California, I still wonder why of all the Chinese names (for the couple of the Starnes expedition) they picked "Tsing Tao
Maybe that was supposed to be funny, but my concept of humor is apparently somewhat different.