Napster continuously evaluates the best way to deliver high audio quality as efficiently as possible. Our mobile apps have the option of streaming Good (AAC+ 64 kb/s), Better (AAC 192 kb/s), and Best (AAC 320 kb/s). Tests show 64 kbps AAC+ is equivalent to 128 kbps MP3, yet requires only half the bandwidth to deliver. Home audio systems use 128 to 320 kbps AAC, depending on the device. PC client downloads in WMA 160 Kbps for offline listening.