Connect Arduino UNO to computer using a USB 2.0 Cable Type A/B. Navigate to the extracted ~\musical-microwave-arduino-mp3-shield\sparkfun-mp3-shield-microwave-switch directory.

* Monitor in the Arduino IDE). If it sees 1-9 it will try to play an MP3 file * named track00x.mp3 where x is a number from 1 to 9. For eaxmple, pressing * 2 will play 'track002.mp3'. A lowe case 's' ...

This arduino audio/music player can amplify and play music from SD card with adding sound effects using your Arduino Board. To play mp3 files using arduino, you need to convert them into .wav files.