Wierd mp3-problems

I know this is not really graphics related, but since it is DirectX-related it put it here. I hope it is okey. I am trying to use Microsoft.DirectX.AudioVideoPlayback to play a mp3-file. The code in my test-application is looking like this: Audio a = new Audio(@"D:\Eat.mp3"); a.Play(); AudioVideoPlayback is playing the mp3-file, but for some reason it sound glitchy and distorted, maybe like it is played to loud. However, even if I am lowering the volume (a.Volume = -8000) the same problem occurs. The mp3-file is played more silent however. I am testing with a lot of differens mp3-files. Some are sounding better than other but in the end they all sound distorted and glitchy in the same way. It appears that mp3s with really high bitrates are worst sounding and the one's with lower bitrates are a better sounding. However, all mp3s are a bit distorted. It is nothing wrong with the mp3-files. They are sounding nice in winamp, deliplayer, VLC, CoolEdit and WMP. I also thought that AudioVideoPlayback, in some was, was bad way to play mp3-files so I tried to use the good old MCI instead (importing winmm.dll and sending mci-messages). The MCI is playing my mp3-files, however they are crippled and distorted in exactly the same way as with AudioVideoPlayback. Anyone has any clues on what is going on and how to fix this? It is very annoying. I'm using SharpDevelope and my soundcard is a standard SB Audigy2, if that helps anyone. Please help! You're my only hope!