I get the same problem, but only on some DVD's. With these problematic DVDs I have tried a complete copy and one stripped down to just the film. Both produce the same results of voice over during quiet parts. I have looked for anything relating for Visually Impaired, but there is never a reference to this. I'm in the UK so not sure if other countries see different items in the DVD content menu in CloneDVD. I'm currently trying by including No Audio clips in case that might help.