The VS1003 from VLSI is a single-chip MP3/WMA/MIDI audio decoder and ADPCM encoder. Central to the IC is a high-performance, low-power DSP processor core VS DSP4. It’s loaded with features: working data memory, 5kB instruction RAM and 0.5kB data RAM for user applications, serial control and input data interfaces, 4 general purpose I/O pins, a UART. Also, a high-quality, variable-sample-rate, mono ADC and stereo DAC, followed by an earphone amplifier and a ground buffer
Comes in an LQFP-48 pin package.