playing sound from computer

is it possible to play a .mp3 file on my computer from arduino?

Sure, if you have some software running on your computer looking for messages from the arduino, it sees a message, and then goes & starts up Winamp or something.

Aww, so I assume there are no built in functions in the arduino code that can accomplish this without the computer doing any work?

You could look at a shield like this

http://www.roguerobotics.com/products/electronics/rmp3 or http://www.adafruit.com/products/94

but it would be the shield playing the music, not the PC.

Thanks!

Hello

try this : Gobetwino http://mikmo.dk/gobetwino.html

This software makes it possible to send Serial.println from the Arduino, starting up files and/or programs on your PC.

See also the Post "Starting the Windows media Player from the UNO" under "Interfacing w/ Software on the Computer "

Regards LYDFANGER