Mi sono fidato di questo (testo presente nell'esempio) :
Hardware Required
Arduino Due Board
8-ohm speaker
Arduino shield with an SD card on CS 4 (like the Ethernet shield)
The Circuit
The shield sits on top of the Due with a micro-SD card in the slot. A .wav file named "test.wav" is in the card's root directory. A speaker is attached to ground, and DAC0.