If you rip your cds with eac, you should have no problem and audacity isn't necessary. It looks like not every application create the same wav file, for the same song.

I use the freeware utility audacity (http://audacity.sourceforge.net/download ) to edit my wavs and i save them again with it. I dont know what has changed, but now xxhighend is working properly.

i had the same problem until i rerip my wavs with audacity (edit the wav and save as wav again!). Everything is fine from then.