Sounds like a sample of one of those shortwave numbers stations.
http://en.wikipedia.org/wiki/Numbers_stations
http://www.organissimo.org/forum/index.php...=12238&hl=conet
What is "not much less" in your estimation? I just finished burning a 79 min audio CD (burned at 40x); total time (extracting audio CD to hard drive + burning): 5min 30sec.
So?