This is their website
http://esupport.sony.com/perl/swu-download.pl?upd_id=1468&PASSVAL2=SMB&template=EN&session_id=f82cfe0a0e94aa07d81fa61ed08b10e3

Part of the description says
ATRAC Advanced Lossless Encoding: An audio CD, or tracks in WAV format, can be compressed and recorded without noticeable sound degradation and transferred to a portable device. Tracks in ATRAC format (including ATRAC Advanced Lossless format) can be saved in WAV format.
NOTE: Tracks purchased from the Connect Music Store cannot be saved in WAV format.