SinOsc s => dac; //Declare a variable named quarterNoteDuration, of type dur dur quarterNoteDuration; //Set the value of quarterNoteDuration to be .5 second .5::second => quarterNoteDuration; //Declare a variable named myFreqVariable, of type float float myFreqVariable; //Set its value to be 220 220 => myFreqVariable; //Use the "freq" function of SinOsc s to set the frequency of s to myFreqVariable myFreqVariable => s.freq; //Play for 1 quarter note quarterNoteDuration => now; //Change the value of myFreqVariable to 880 880 => myFreqVariable; //Set s frequency to the new value of myFreqVariable myFreqVariable => s.freq; //Play for 1 quarter note quarterNoteDuration => now;