"Set-up's okay"

Around 5:30 a.m.Central this morning (Sunday Oct. 23, 2011), the alarm device sounded an intruder to the south of the house. It was still dark and the temperature was in the mid-thirties. I didn't investigate, because I figured that it was some animal visiting the compost pile. The alarm sounded again 10 minutes later. I figured breakfast was over. At 6:45 a.m. I was outside attending to some chores when I (and others) heard a male's voice with a distinctively southern accent say, "Set-up's okay." The voice came from about 50 yards to the north of the house in the woods. I immediately investigated, but couldn't find anyone. After a few minutes, I gave a holler. No reaction. I looked around for awhile longer, but couldn't find anyone. Bizarre.