I read what you had to say about different players and the varying quality, with interest.
I have been using WMP recently (user friendly) but had used RealPlayer before (not user friendly (in my opinion)).
I had a few files that had what could be described as high pitched squeeks - so I deleted them. I d/l them again but some still had the problem.
When I read what you had to say, it prompted me to have a change. So I d/l a newer version of RealPlayer. What a difference - no squeeks on the one remaining file I had that I thought I was going to have to download again.
But to really check this out I tried playing that file again with WMP and guess what - it's OK on that player too now.
The only thing I can think of is that there was a problem somewhere and this new version has fixed the problem in both. Very strange.
I tried launching it and it played OK in there as well.
The sound quality in both players is 100% better.
One thing that I have found - is that when in WMP you switch from the Media Library to Playing Now whilst playing, the squeeks come back, but if you start the track again they go!
So anyway, your post has help me sort my problem out Pity I had deleted some of the files that were bad.
Don't know about the default problem I've not looked at that yet.
Thanks very much
Kath