Audio playback issues

Hi Guys, I'm Adam. First post - hope you can help! I've heard a lot of good things about this forum. Okay, I'm still in evaluation mode and struggling to get anywhere with setup. If I open an iTunes track in Win Media Player or Audacity my sound card makes it sound beautiful. If I import the same track into Reaper it sounds really rough - thin and tinny and reverby and slidey. I've tried many many different setups in the project settings and audio device preferences/options and, except for adding pops and crackles sometimes, nothing changes. Anyone know what I'm doing wrong, please? Many thanks Adamskibruce - Win7 64bit Corei7 3.4GHz 16GB RAM SoundBlaster X-FI Titanium - Want to use Reaper to compose and produce electronica and classical tracks using VST synths

Solved 

Was just about to go dejectedly to bed and stumbled across the answer. Not even sure where this was, but in the ?FX monitoring window? there was a JS guitar/chorus filter. Removed that and now we're cooking with gas! Perhaps someone with some more experience can tell me where I got that from, especially as it didn't seem to render with that FX in the test I ran. Cheers AB