1. What is a virtual multi-disc CD
· require advance one by one to the contents of the CD store to multi-disc pod.
· virtual multi-disc-vehicle navigation system generally used in the remaining storage space.
* can only save or delete the entire contents of the disc, can not store or delete individual tracks.
· Today, the rapid development of in-vehicle systems, external audio interface (USB / SD card, etc.) is more commonly used.