What sounds better than CD quality? CD-A, DVD-A and other formats claim to sound better than CDs.
CD audio files are 16 bit depth at 44.1000 sample rates, the same file specifications as the RealTrack files available in the Audiophile edition of Band-in-a-Box.
+++ HD Tracks, com +++ offers audio files created at higher bit depths and / or sample rates.
Are they better? I don't know but you can visit the website, request the free sampler and find out for yourself.