Here's some audio links I discovered from this site: http://www.tudou.com/home/dprkradio

"Here are recordings of radio broadcasts from North Korea (mainly in English) from the official state broadcaster. The recordings have been made directly from a shortwave radio, so the sound quality will vary. I hope this is a useful service for anyone interested in North Korea and any radio enthusiasts who would otherwise find it difficult to receive Pyongyang radio. It's relatively easy for me, as I live in China. I will also add some other interesting things from North Korea, such as documentary films and music. Hope you enjoy what's on offer here"

June 23 Voice Of Korea (part 1) 22:41 http://www.tudou.com/programs/view/AsQ5n2HcDXM/
Song -"We Are The Masters Of The Farm" 4:35 http://www.tudou.com/programs/view/ot5D1pNDFIM/
June 5 Voice Of Korea 28:14 http://www.tudou.com/programs/view/ZspnsxBJzbY/
June 4 Voice Of Korea (part 1) 28:37 http://www.tudou.com/programs/view/mgwuvVDCsaU/

Just click on the link and the site will open load and play. Sometimes when the site opens a big "play" icon will appear, but ignore it, it will go away after a few seconds - if you do click on it an additional window opens, which I didn't explore.