I downloaded digital music from iTunes but burned them using Windows Media Player and they all work fine.
Audio Files Supported
(Files created with a combination of 48 kHz sampling frequency and 64 kbps bit rate cannot be played )
MP3
Version MPEG1 Audio Layer 3
Sampling frequency 8 kHz - 48 kHz
Bit rate 8 kbps- 320 kbps, VBR *1
WMA
(Protected WMA files (DRM) cannot be played )
Version WMA7,WMA8, WMA9
Sampling frequency 32 kHz - 48 kHz
Bit rate 32kbps - 192 kbps, VBR *1
AAC
( Models with navigation system )
Version MPEG-AAC
Sampling frequency 8 kHz - 96 kHz
Bit rate 16 kbps- 320 kbps, VBR *1
Tag information (Song title and Artist name)
ID3 tag VER1.0, VER1.1, VER2.2, VER2.3, VER2.4 (MP3 only)
WMA tag (WMA only)
*1 When VBR files are played, the playback time may not be displayed correctly