diff --git a/sclang-play/tut/ch02.sc b/sclang-play/tut/ch02.sc
new file mode 100644
index 0000000..015ce1e
--- /dev/null
+++ b/sclang-play/tut/ch02.sc
@@ -0,0 +1,195 @@
+(
+  s.boot;
+)
+
+(
+  FreqScope.new;
+)
+
+(
+  {
+    WhiteNoise.ar(0.1)
+  }.scope
+)
+
+(
+  {
+    LPF.ar(WhiteNoise.ar(0.1), 1000)
+  }.scope
+)
+
+(
+  {
+    HPF.ar(LPF.ar(WhiteNoise.ar(0.1), 1000), 1000)
+  }.scope
+)
+
+(
+  {
+    LPF.ar(WhiteNoise.ar(0.1), Line.kr(10000, 1000, 10))
+  }.scope
+)
+
+(
+  {
+    Resonz.ar(
+      LFNoise0.ar(400),
+      1000,
+      0.1
+    )
+  }.scope
+)
+
+(
+  {
+    Resonz.ar(
+      LFNoise0.ar(400),
+      Line.kr(10000, 1000, 10),
+      0.1
+    )
+  }.scope
+)
+
+(
+  {
+    var source, line, filter;
+
+    source = LFNoise0.ar(400);
+    line = Line.kr(10000, 1000, 10);
+    filter = Resonz.ar(source, line, 0.1);
+
+    filter
+  }.scope;
+)
+
+(
+  {
+    SinOsc.ar
+  }.scope
+)
+
+(
+  {
+    SinOsc.ar(400, 0, 0.1) + SinOsc.ar(660, 0, 0.1)
+  }.scope
+)
+
+(
+  {
+    SinOsc.ar([400, 660], 0, 0.1)
+  }.scope
+)
+
+(
+  {
+    Pan2.ar(
+      WhiteNoise.ar(0.1),
+      MouseX.kr(-1, 1)
+    )
+  }.scope
+)
+
+(
+  {
+    SinOsc.ar([400], 0, 0.1)
+  }.scope
+)
+
+(
+  {
+    SinOsc.ar(400, 0, 0.1)
+  }.scope
+)
+
+(
+  {
+    SinOsc.ar([400, 660, 870], 0, 0.1)
+  }.scope
+)
+
+(
+  {
+    Mix(
+      SinOsc.ar([400, 660], 0, 0.1)
+    )
+  }.scope
+)
+
+(
+  {
+    Pan2.ar(
+      Mix(
+        SinOsc.ar([400, 660], 0, 0.1)
+      ),
+      MouseX.kr(-1, 1)
+    )
+  }.scope
+)
+
+// sawtooth wave
+(
+  {
+    var n = 10;
+    var wave = Mix.fill(10, { |i|
+      var mult = ((-1) ** i) * (0.5 / ((i + 1)));
+      SinOsc.ar(440 * (i + 1)) * mult
+    });
+
+    Pan2.ar(wave / n, 0.0);
+  }.scope
+)
+
+// square wave
+(
+  {
+    var n = 10;
+    var wave = Mix.fill(10, { |i|
+      var harmonicnumber = 2 * i + 1;
+      SinOsc.ar(440 * harmonicnumber) / harmonicnumber
+    }) * 0.25;
+
+    Pan2.ar(wave, 0.0);
+  }.scope
+)
+
+// triangle wave
+(
+  {
+    var n = 10;
+    var wave = Mix.fill(10, { |i|
+      var harmonicnumber = 2 * i + 1;
+      var mult = ((-1) ** ((harmonicnumber - 1)/2)) * (1.0/(harmonicnumber*harmonicnumber));
+      SinOsc.ar(440 * i) * mult
+    })/n;
+
+    Pan2.ar(wave, 0.0);
+  }.scope
+)
+
+(
+  {
+    Mix(
+      SinOsc.ar(500 * [0.5, 1, 1.19, 1.56, 2.51, 2.66, 3.01, 4.1], 0, 0.1)
+    )
+  }.scope
+)
+
+(
+  {
+    Mix(
+      SinOsc.ar(
+        500 * [0.5, 1, 1.19, 1.56, 2.51, 2.66, 3.01, 4.1],
+        0,
+        0.1 * [0.25, 1, 0.8, 0.5, 0.9, 0.4, 0.3, 0.6, 0.1]
+      )
+    )
+  }.scope
+)
+
+(
+  var n = 10;
+
+  {
+    Mix(SinOsc.ar(250 * (1..n), 0, 1/n))
+  }.scope
+)