For what it's worth, I have attached a small snippet of a recording I did yesterday. The recording was going along fine, then all of the sudden, at 55:14 into the recording, it sped up. This happens at about 5.03 in this snippet. You can see that at 5.03 the frequency of the voice doubles. I was also incorrect in my numbers yesterday, a -50% speed change gives me the closest sound to the original, not -49.5%. I noticed that other people report this problem when they are recording in mono, as I was yesterday. I have never seen this problem when recording in stereo. I will do more testing on this tonight.
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