noise

a question on Camtasia studio and Flash

I have a faculty member who has dozens of Flash video clips produced from Camtasia studio. These video clips have been used in his classes for several semesters and had never had audio problems. However, recently the same video clips start giving out sporadic "tweaked noise" - something like playing a fast-forwarded audio cassette - along the normal narration. Meanwhile, any keyboard strikes recorded before now echo so much that they sound like fireworks.

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