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.
embedded - inserted as an integral part of a surrounding whole; confused by the embedded Latin quotations; an embedded subordinate clause. integrated - formed into a whole or introduced into another entity; a more closely integrated economic and political system- Dwight D.Eisenhower; an integrated Europe.