int midi_write_msg2(int fd,unsigned char status,unsigned char data1);
int note_on(int fd,int chan,int note,int vel);
int note_off(int fd,int chan,int note,int vel);
int midi_write_msg2(int fd,unsigned char status,unsigned char data1);
int note_on(int fd,int chan,int note,int vel);
int note_off(int fd,int chan,int note,int vel);