diff --git a/sclang-play/tutorial.sc b/sclang-play/tutorial.sc
index d95c9fa..083b8b5 100644
--- a/sclang-play/tutorial.sc
+++ b/sclang-play/tutorial.sc
@@ -31,3 +31,45 @@
     Pan2.ar(PinkNoise.ar(0.2), -0.3);
   }.play;
 )
+
+(
+  {
+    PinkNoise.ar(0.2) + SinOsc.ar([440, 442], 0, 0.2) + Saw.ar([660, 662], 0.2);
+  }.play;
+)
+
+(
+  {
+    var a, b;
+    a = [
+      SinOsc.ar(440, 0, 0.2),
+      Saw.ar(662, 0.2)
+    ];
+    b = [
+      SinOsc.ar(442, 0, 0.2),
+      Saw.ar(660, 0.2)
+    ];
+
+    Mix([a, b]).postln;
+  }.play;
+)
+
+(
+  var n = 8;
+  {
+    Mix.fill(n, { SinOsc.ar([220, 500 + 500.0.rand], 0, 1 / n) });
+  }.play;
+)
+
+(
+  var n = 8;
+  {
+    Mix.fill(n, { |index|
+      var freq;
+      index.postln;
+      freq = 440 + index;
+      freq.postln;
+      SinOsc.ar(freq, 0, 1 / n)
+    });
+  }.play;
+)