MP3 Shield description:
The MP3 Shield wires your Arduino up to a VS1053D MP3 audio decoder IC, providing it with the ability to decode audio files. The VS1053 is also capable of decoding Ogg Vorbis/MP3/AAC/WMA/MIDI audio and encoding IMA ADPCM and user-loadable Ogg Vorbis.
The VS1053 receives its input bitstream through a serial input bus (SPI). After the stream has been decoded by the IC, the audio is sent out to both a 3.5mm stereo headphone jack, as well as a 2-pin 0.1″ pitch header.
MP3 Shield specification:
MP3 Shield pinout:
For more detail: MP3 Shield
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