"Wow" in music playback

[PeterM]

When I play MP3 files with one of the players (Music Library or a plugin), the sound quality is clearly affected by screen redrawings. The sound "wows", i.e., it is as if an old tape recorder slows down a half-second or so, every time the screen redraws when another menu is shown, or if the My Music panel time counter changes every second.

Any ideas?

peter