It's convenient to connect the headphone jack on your computer to external devices so you can play the sound from your digital audio files over a larger speaker system. Even though the Bose SoundDock is designed for portable audio devices, such as MP3 players and smartphones, you can also use the auxiliary input to hook up other audio devices to the Bose system. The connection will only take a brief time to set up.
Plug one side of the stereo cable into the headphone jack on your computer.
Insert the other side of the cable into the "AUX IN" port on the rear of the Bose SoundDock.
Play a song or other audio file on your computer, and press the "AUX" button on the Bose remote to play the sound over the Bose SoundDock.