If the CDs are store not home made you may need a cleaning disk. The sell these for DVD , it has small brush that rotates to clean lens. if you player can play homemade then you need to make sure the file extension matches most common Windows names. Winamp etc. Make sure if MP3 you have left space most cars will accept 700 mb discs but use only 650 - 680 space for you files. Check CD for scratches or any defects to surface.
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If the CDs are store not home made you may need a cleaning disk. The sell these for DVD , it has small brush that rotates to clean lens.
if you player can play homemade then you need to make sure the file extension matches most common Windows names. Winamp etc.
Make sure if MP3 you have left space most cars will accept 700 mb discs but use only 650 - 680 space for you files.
Check CD for scratches or any defects to surface.