This hobby is getting weird ....

I once had a preamp that would pickup radio broadcast from Mexico or at least the language was spanish.

When I listen to music now I hear voices telling me to complain about Audiogon's voting policy.................

I think your head is discharging the sound back to the headphones. Sometimes it takes the entire lenght of the CD to get rid of it.

Centurymantra, The source of the "voices" you were hearing was probably athe residue of a mastertape that was not "fresh". Very often master tapes are "erased" and then recorded over. When you crank it up a bit you can often hear the "residue" of the previously "erased"
recording. I used to have a small recording studio, and have heard exactly what you described countless times.
Hornby... it was probably RF interference. Happens all the time. I doubt there is anything spooky going on here.