int PS_AudioOpen(int frequency, Uint16 format, int channels, int chunksize)
	This Function is used to create a MPEG object for use in your program.
	Simply declare a variable as a pointer to type PM_Mpeg and assign it
	the return value of this function with the path and filename of the
	Mpeg you wish to use as the argument.

	EX:
	PM_Mpeg *MyMpeg;
	MyMpeg = PM_CreateMpeg("./mympeg.mpg");


PS_AudioQuery(int *frequency, Uint16 *format, Uint8 *channels)
void PS_AudioClose(void)
void PS_AudioMix (Uint8 *dst, Uint8 *src, Uint32 len, int lvol, int rvol)

