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Voyager Interstellar Record - The Sounds Of Earth (NASA), 1977.

The Voyager Golden Record is a phonograph record, attached to the two voyager space crafts that launched in 1977. It contained messages from Earth and scenes, greetings, music and sounds from Earth.  NASA intended to communicate a story of our world to extraterrestrials.
The Voyager message is carried by a phonograph record-a 12-inch gold-plated copper disk containing sounds and images selected to portray the diversity of life and culture on Earth. The contents of the record were selected for NASA by a committee which included 115 images and a variety of natural sounds, such as those made by surf, wind and thunder, birds, whales, and other animals. Musical selections were added from different cultures and eras which included spoken greetings in fifty-five languages.
This included 90-minute selection of music, including both Eastern and Western classics and a variety of ethnic music.
If the voyager is ever found by an aliens, it will most likely reached by extraterrestrial species in 40,000 years.

http://voyager.jpl.nasa.gov/spacecraft/goldenrec.html