//creating sine waves and sending it to the dac
SinOsc mySin1 => dac;
SinOsc mySin2 => dac;

//set the volume (gain) and pitch (freq) of the 2nd sine wave
0.5 => mySin2.gain;
220 => mySin2.freq;

//advance time by 2 seconds (let the 2nd sine wave sound for 2 seconds)
2::second => now;

//set the volume (gain) and pitch (freq) of the 1st sine wave
1.0 => mySin1.gain;
333 => mySin1.freq;

//advance time by 3 seconds (let the 1st sine wave sound for 3 seconds)
3::second => now;