madplay

MPEG audio player in fixed point
MAD is an MPEG audio decoder. It currently only supports the MPEG 1
standard, but fully implements all three audio layers (Layer I, Layer II,
and Layer III, the latter often colloquially known as MP3.). There is also
full support for ID3 tags.
.
All work is done in fixed point, so it even works on machines without an FPU.