int aux;
int note[]={....}//contain the notes
while(aux!=57){ //create a cicle until aux different of 9, "9"==59               

    if(_conio_kbhit()){
        aux=getch();
        SetSound(note[aux-49]); //aux receive a number between 0-9
    }                           //but it is in char. "1" is the 
                                //number 49 char
}