The two recorders used were:
Tape: Desktop tape recorder with external, preamplified omnidirectional microphone (with 100Hz - 10kHz range).
Digital: Radio Shack personal voice recorder (cat no. 14-1189).
The first was behind the stage at about 10:14pm just before we started asking EVP questions. A harshly whispered, halting voice says "Go Away". I double-checked this on my recorder and though it sounds more choked, it's still there.
The second was an incoherent whisper about five minutes later after Joe asks "Is it hard to communicate with us?". I went to the same spot on my tape recorder, and it turns out to be voices of other ghost trackers talking out in the auditorium. I note this one because it was useful having two recordings of the same thing in order to scientifically rule out false postives.
The third was the spookiest. It's taken in the auditorium at around 10:25pm, about 10 minutes before the final EVP session led by Keri. Someone whistles, then there is an EVP, a harsh voice that says threateningly, "Get out!". Unfortunately, I wasn't recording on my tape recorder at the time, so we just have the one (very clear) recording.