Talking about using Arduino to play music, is it the Arduino MP3 shield not the first thing you come up with? Or maybe some geeks will consider about tone() function? They are not the things our topic is about today. We don’t need any MP3 shield, tone(), or SD card. Only Arduino can perfectly play the music you like. It’s cool. Do-it-yourself a home-brew MP3 player for dear daddy or little daughter is fascinating. If you got a small Freaduino Nano or Freaduino Pro to put this int...