if (i==1){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 3*Fout*two32/Fs ;
            FM_max_amplitude=10000 ;
            FM_attack_time=100; 
            FM_decay_time=30000;
            FM_sustain_time=100;
            PT_YIELD_TIME_msec(1000);
        }
        if (i==2){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 1.8*Fout*two32/Fs ;
            FM_max_amplitude=12000; //6000
            FM_attack_time=100; 
            FM_decay_time=20000;
            FM_sustain_time=1000;
            PT_YIELD_TIME_msec(1000);
        }
        
        if (i==3){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 0.1*Fout*two32/Fs ;
            FM_max_amplitude=6000;
            FM_attack_time=100; 
            FM_decay_time=35000;
            FM_sustain_time=1000;
            PT_YIELD_TIME_msec(1000);
        }
        
        if (i==4){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 5*Fout*two32/Fs ;
            FM_max_amplitude=10000;
            FM_attack_time=100; 
            FM_decay_time=20000; //10000
            FM_sustain_time=1000;
            PT_YIELD_TIME_msec(1000);
        }
        
        if (i==5){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 1.05*Fout*two32/Fs ;
            FM_max_amplitude=20000;
            FM_attack_time=100; 
            FM_decay_time=20000;
            FM_sustain_time=1000;
            PT_YIELD_TIME_msec(1000);
        }
        
        if (i==6){
            // start a new sound
            // critical section?
            note_time = 0 ;
            current_amplitude = 0 ;
            FM_current_amplitude = 0 ;
            FM_DDS_increment = 2*Fout*two32/Fs ;
            FM_max_amplitude=50000;
            FM_attack_time=100; 
            FM_decay_time=1000;
            FM_sustain_time=500;
            PT_YIELD_TIME_msec(1000);
        }