Real1 streaming audio won't record properly

I've used a couple of different streaming audio recorders to try and record some music files that are being streamed on Real1Player. However, when I play back the recorded file, the length of the file has been expanded by about 10%, giving me distorted sound, playing back too slow.
I've tried things like turning off my anti-virus software and firewall and I've also eliminated the audio acceleration and reduced the sampling frequency.
I also get the same effect if I record to WAV or MP3 format.

I can record properly on stream types other than Real1.
Any ideas?