int pad(int port);
int sndinit();
int soff();
int sndclr();
int sndset(char *data);
int toneset(char *data, int ch, int ton);
int chgtone(int ch, int ton);
void intenv();
int evolume(int ch, int lvol, int rvol);
int keyon(int ch, int pit, int vol);
int keyoff(int ch);
int pcmplay(char *data, int ch, int pit, int vol);
int snduse(int sw);
void mute(int sw);
int pmbset(char *t, int size);
void sinit();
void play(int c, int x, int vol);
void span(int c, int x);
void chpitch(int c, int x);