My robotics team needs a little help. We have an Arduino Uno and a Duemilanova. We also have an SD card reader. What we want to to is put some sound files on the SD card and play a specific file when a button is pressed. The goal is to create an interactive display where people can press a button and get information. What would be the best format to use, WAV, MP3 or something else? The information will be spoken. Also, what size SD card can the Arduino recognize? We have almost everything from 2gb to 16gb. Will any work or just a certain size? Any links to code would be greatly appreciated.