#include "mbed.h"
class Speaker
{
public:
    Speaker(PinName pin) : _pin(pin) {
    }
    void PlayNote(float frequency, float duration, float volume) {
        _pin.period(1.0F/frequency);
        _pin = volume/2.0F;
        wait(duration);
        _pin = 0.0F;
    }

private:
    PwmOut _pin;
};

int main()
{
    Speaker mySpeaker(p21);
    float v = 0.5F;
    float achtel = 0.125F;
    while(1) {
        //1st Tackt
        mySpeaker.PlayNote(592.314511,achtel,v);
        mySpeaker.PlayNote(462.182625,achtel,v);
        mySpeaker.PlayNote(635.869666,achtel,v);
        mySpeaker.PlayNote(740.825333,achtel,v);
        mySpeaker.PlayNote(553.953250,achtel,v);
        mySpeaker.PlayNote(489.441666,achtel,v);
        mySpeaker.PlayNote(503.804714,achtel,v);
        mySpeaker.PlayNote(553.953250,achtel,v);
        //2nd Tackt
        mySpeaker.PlayNote(511.566030,achtel,v);
        mySpeaker.PlayNote(689.442777,achtel,v);
        mySpeaker.PlayNote(660.0,achtel,v);
        mySpeaker.PlayNote(493.516250,achtel,v);
        mySpeaker.PlayNote(644.365088,achtel,v);
        mySpeaker.PlayNote(486.892545,achtel,v);
        mySpeaker.PlayNote(545.051727,achtel,v);
        mySpeaker.PlayNote(644.365088,achtel,v);
    }
}