Is there a noticeable difference in sound quality between 128 and 64kbps WMA files? I have listened to the sample files on the Microsoft website and they sound similar (although 32 and 20kbps sound pants).
I have already saved some of my own CDs to my hard drive at 128kbps and transferred them to my Rio Nitrus 1.5GB and my son's Rio Carbon 5GB MP3 players.
I can definitely perceive the difference between 64 kbps and 128 kbps. Even via Sennheiser phones from an mp3 player and even more so when playing same files from a cd on my hifi system. I think the only way to reduce from 128 to 64 kbps is by reripping but maybe someone else is aware of a more efficient method.