diff --git a/sclang-play/tutorial.sc b/sclang-play/tutorial.sc
index d44707e..8cbdc3d 100644
--- a/sclang-play/tutorial.sc
+++ b/sclang-play/tutorial.sc
@@ -388,3 +388,39 @@
   y.set(\direct, 0);
   z.set(\direct, 0);
 )
+
+(
+  b = Bus.control(s, 1);
+  b.set(880);
+
+  c = Bus.control(s, 1);
+  c.set(884);
+
+  x = SynthDef(
+    "tutorial-map",
+    {
+      |freq1 = 440, freq2 = 440|
+      Out.ar(0, SinOsc.ar([freq1, freq2], 0, 0.2));
+    }
+  ).play(s);
+
+  // x.map(\freq1, b, \freq2, c);
+
+  /*
+  y = {
+    Out.kr(b, SinOsc.kr(1, 0, 50, 880));
+  }.play(addAction: \addToHead);
+  */
+
+  // y.free;
+
+  // b.get({ |val| val.postln; f = val; });
+
+  // x.set(\freq2, f / 2);
+
+  // c.set(200);
+
+  // x.free;
+  // b.free;
+  // c.free;
+)