The Sony Audio Control RPC API provides a way to develop audio apps with control features such as; power, volume, sound mode, functions and multi-zone. This API uses JSON-RPC, a light communication protocol with some extensions and restrictions, for use with three types of messages that include; Set messages, Get messages and Notification messages. This allows you to set some parameters on the device, get some parameters from the device and messages sent from a device without a request from the client, to notify the client about a parameter change. The Audio Control API allows you to extend or develop applications and services to control supported Sony audio products from another device. An application using the API could remotely control the power, volume, input source, equalizer, and music playing on a supported device. Sony Mobile is a subsidiary The Sony Corporation, a global innovator of audio, video, game, communications, key device and information technology products for both the consumer and professional markets.