I get this problem on my PVR150, which is hooked to my cable box via s-video and RCA audio jacks....

Sometimes I'll record something and the sound will be high-pitched, severely distorted, and unlistenable. It'll be that way throughout the entire recording, and the next recording will be fine. Sometimes I'll notice the problem while Myth is recording the show...if I stop and reactivate the recording, it will begin recording the show with perfect, normal sound.

Has anyone else seen this problem? My HD tuner doesn't have this issue.

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Currently running: R5.5, HD5000 x 2, PVR150, Athlon 64 3000+, Chaintech VNF4, 1GB RAM, 2 x 250GB in LVM, MSI NX6200TC -> AA 9A60 -> HDTV