add examples

examples/strumtest1.js

@@ -0,0 +1,19 @@
+
+const k = 0.02;
+
+function tablature(te,tB,tG,tD,tA,tE)
+  { return stack(tE.add(64).late(k*5),
+                 tA.add(59).late(k*4),
+                 tD.add(55).late(k*3),
+                 tG.add(50).late(k*2),
+                 tB.add(45).late(k),
+                 te.add(40)); }
+
+const guitar = seq(tablature("0","2","2","1","0","0"),
+                   tablature("0","3","2","0","1","0"),
+                   "~");
+
+stack(
+  guitar.note().s("gm_electric_guitar_jazz").clip(1).release(0.4).gain(0.5),
+
+).cpm(110/4/2).pianoroll()