A simple/older auto CD player will only play Redbook CD's--Compact Disc Digital Audio (CDDA or CD-DA). These are CD's that have a sample rate of 44.1 KHz and a bit-depth of 16. If you are ripping disks for your car's audio system then lossless audio with Redbook specs will have *.aiff or *.wav extensions. iTunes and Windows Media Player can do this for you. You can get audio DVD and SACD players for your car, but realize that you cannot rip SACD disks.