struct IOAudio *GetAudioChannel(ULONG bufferSize);
void FreeAudioChannel(struct IOAudio *aIOB);
void InitAudioChannel(struct IOAudio *aIOB,UWORD volume,UWORD period);
struct IOAudio *DuplicateAudioChannel(struct IOAudio *OrigIOB);
void DeleteDuplication(struct IOAudio *aIOB);
ULONG LoadAudioBuffer(BPTR file,struct IOAudio *aIOB,ULONG toRead);
void Position(BPTR file,char *string);
void WriteMsg(char *errMsg);
void cleanup(int err);


typedef struct Voice8Header
{
   ULONG oneShotHiSamples,
	 repeatHiSamples,
	 samplesPerHiCycle;
   UWORD samplesPerSec;
   UBYTE ctOctave,sCompression;
   LONG volume;
};

#define MIN(x,y) ( (x) < (y) ) ? (x) : (y)