Distributed audio is a standard feature in many homes. The three basic types of distributed audio systems are background, foreground and a combination of the two.
A place that requires soft background music is an example of a background system. A place that requires louder music is an example of a foreground system. A combination system is where both types of music are utilized.
Systems are typically comprised of ceiling mount and surface mount speakers, distributed amplifiers, mixers and multiple media players allowing for unlimited configurations to meet your specific requirements.