Datasheet

GPIO Breakouts

The VS1053 codec chip has 7 'General Purpose Input/Output' pins that you can use to detect button

presses and/or light up a small LED. GPIO1 is also used to put it into MIDI mode. By default all

these pins are pulled low to ground with 100K resistors. They are 3V logic level so if you want to

attach a button, you can connect the two wires between the GPIO pin on the left and the 3V

breakout on the right. If you don't want to use these pins just leave them be, they are not required

for use!

MicroSD Card Socket

In order to play MP3, WAV, OGG, etc files, you'll need to store them on a MicroSD card. These are

very very common, available in the Adafruit shop or any electronics store. You can use any

FAT16/FAT32 formatted card from 64M up to 8G. Chances are its pre-formatted for this so you can

just drop files on. This is a push-push socket, push the card in once to seat in, push again to pop

out. The chip to the right is the level shifter to make it safe to use with 5V logic like Arduino

Line Out

https://learn.adafruit.com/adafruit-music-maker-shield-vs1053-mp3-

wav-wave-ogg-vorbis-player

Page 9 of 33