Hi all, A while ago I was singing the praises of the Trust "budget" Optical Expert sound card in this very forum. Now it appears that I have a problem with it. To summarise, any music that I play through my PC sounds "garbled" slightly. I'm not sure how to fully describe the problem, but it seems to get worse the more complex the music is. Also, it seems worse on compressed formats like MP3 than WAV. I may be imagining it, but the garbling seems worse on higher bitrate MP3s (128) than lower ones (112). I have played CDs through my card directly to my amp (Denon 1803 in 5 speaker stereo mode) and there is no garbling. Therefore, despite the thread title, the problem may be in the way my PC is passing data off the disk to the soundcard, rather than the soundcard itself. The disk is a 7200rpm 80Gb unit with a 2Mb cache, so speed shoudn't be an issue. Also, I'm sure that previously (with my old on-board AC97 sound card) playback was fine. The only other thing I have changed is that I have installed DirectX 9 as part of the installation for the Enter the Matrix game. Does anyone have any ideas where this garbling is coming from? Should I have re-installed the sound card drivers after the DirectX 9 installation? Thanks in advance.