1) VS1003 audio decoding formats : MP3, MP3 + V, WMA, WAV, MIDI, SP-MIDI; 2) Recording encoding format : IMA ADPCM ( monaural ) , microphone and line input (Line input) two input methods 3) Supports MP3 and WAV streams 4) Low power consumption 5) Has internal PLL clock frequency multiplier 6) Quality stereo DAC (DAC) 7) Adjustable on-chip analog to digital converter (ADC) 16 spaces 8) Separate analog , digital, and IO power supply ; 9) Serial data and control interface (SPI);