I just picked up some Sesame Street DVDs from the library for my son, and was planning on buying one that was a hit with him. But after playing a couple of them, I'm wondering: do some of these early DVDs have pretty awful sound quality? I'm thinking specifically of "Sing Yourself Silly" and "The Best of Elmo," which sound as if they were dubbed from a worn VHS copy, with heavy treble and lots of clipping. I'm curious because my library obviously has the first-run DVD issues. I notice in the store that these now come in nicely redesigned cases, so I was wondering if they cleaned up the quality as well. Thanks!