Features

Can play a variety of music formats, support for OGG encoding real-time recording

SPI interface, the control signal lines are led out

A headphone and stereo output

A microphone for recording

A line_in input interface

Power indicator

3.3V and 2.8V of LDO chip AMS-1117 on board, provides up to 800mA current

A single power supply: +5 VDC

12.288 Mhz crystal

SD card slot

Decodes formats:

Ogg Vorbis

MP3 = MPEG 1 & 2 audio layer III (CBR+VBR+ABR)

MP1 & MP2 = MPEG 1 & 2 audio layers I & II optional

MPEG4 / 2 AAC-LC(+PNS), HE-AAC v2 (Level 3) (SBR + PS)

WMA4.0/4.1/7/8/9 all profiles (5-384 kbps)

FLAC lossless audio with software plugin (upto 24 bits, 48 kHz)

WAV (PCM + IMA ADPCM)

General MIDI 1 / SP-MIDI format 0

Encodes formats from mic/line:

Ogg Vorbis with software plugin

IMA ADPCM

16-bit PCM

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VS1053B Stereo Audio MP3 Player Shield