Shall be able to apply business logic implicitly.

・The latter source win : Discards the former source and output the latter source.

・The latter source win and the former source pause : Pause the former source and output the latter.

・The latter source lose : Continues the former source and discards the latter source.

・The latter source is put on hold : Continues the former source and puts the latter source on hold.

Shall have a persistency for sound source which is active before system shout down.

Shall have a persistency for sound volume of each sound source.

Shall know all sound sources and sinks in IVI system.

Shall manage source route regardless of source and sink location.

Shall manage volume regardless of the master of volume location.

Shall be able to be used by application developer easily.

Shall be designed to support various kinds of communication protocols( e.g. MOST, CAN,,, ).

Service must be secured through applicative permission attribution and checking mechanism.