Some YouTube users are mounting a growing revolt against the site's new audio scheme, which has degraded the sound quality of clips on the site by running them through an audio processor that wreaks havoc with songs' dynamic range (the variation between loud and soft), diminishing their sound quality.
From
this Wired article.
Has anyone had this issue yet? I had a weird audio problem about five weeks ago but when I re-uploaded the file it worked perfectly well, so it may not have been this issue.