The Bluetooth feature built into most A/V receivers (or Bluetooth adapters) is to allow a portable device such as a phone or tablet to stream music to that receiver. This way you can listen to your digital music or streaming apps like Pandora or Spotify from your phone through your main speaker system.
An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.[1][2] It is embedded as part of a complete device often including hardware and mechanical parts.
An embedded system is a computer that has been built to solve only a few very specific problems and is not easily changed.In contrast, a general-purpose computer can do many different jobs, and can be changed at any time with new programs for new jobs.n embedded system usually does not look like a computer, often there is no keyboard or monitor or mouse. But like any computer it has a processor and software, input and output. The word embedded means it is built into the system.