(
  {
    var pitchOsc;
    var ampOsc;
    pitchOsc = { 300 + SinOsc.kr(0.1, 1.5pi, 20, 20); };
    ampOsc = SinOsc.kr(0.5, 1.5pi, 1.0, 1.0);
    SinOsc.ar([pitchOsc, pitchOsc], 0, ampOsc);
  }.play;
)

(
  { [SinOsc.ar(440, 0, 0.2), SinOsc.ar(442, 0, 0.2)] }.play;
)

(
  {
    var freq;
    freq = [[600, 880], [400, 660], 1320, 880].choose;
    SinOsc.ar(freq, 0, 0.2);
  }.play;
)

(
  {
    Pan2.ar(PinkNoise.ar(0.2), SinOsc.kr(0.5));
  }.play;
)

(
  {
    Pan2.ar(PinkNoise.ar(0.2), -0.3);
  }.play;
)