I'm kind of a novice when it comes to bit rates and such, but I currently rip CD's to my MP3 player at 192. 192 sounds fine to me, but my player is almost filled up. Is there much difference in sound if I switched to 128? I only listen to these files through my MP3 player and comp speakers. Would I even notice a change to 128 with what I'm listening with? Any feedback is appreciated. Thanks.