Patent ID: 6990208

Claim:
A vehicle sound system, comprising: a port capable of being connected to a disc changer; one or more speaker outputs; one or more processor readable storage devices capable of storing user replaceable interface program code and music data files, said one or more processor readable storage devices includes a removably connected hard disk drive, said hard disk drive stores said music data files in a compressed format; and one or more processors in communication with said one or more processor readable storage devices and said port and said one or more speaker outputs, at least one of said one or more processors engages in two-way communication with said disc changer based on said replaceable interface program code, at least one of said one or more processors plays said music data files, said at least one processor that plays said music data files accesses said music data files from said hard disk drive, said one or more processor readable storage devices include a memory device; said one or more processors perform a method comprising the steps of: determining whether new replaceable interface program code is to be loaded, reading said new replaceable interface program code from said hard disk drive if said new replaceable interface code is to be loaded, and storing said new replaceable interface code on said memory device if said new replaceable interface code is to be loaded.