Using SPI protocol we can interface with SD card.We all know that. My doubt is how to play an .mp3 song in SD card.For example there are 4 songs with names 1.mp3 , 2.mp3, 3.mp3, 4.mp3. If I want to play 3.mp3 in a speaker then what the code I need to write?Is it possible to play particular file present in SD card?
What have you found with Google? I can tell you that if you want it to sound good, you will need a mp3 module or shield.