--- /dev/null
+ol = library("oscillator.lib");
+fl = library("filter.lib");
+el = library("effect.lib");
+
+//process = ol.sawtooth_demo <:
+// el.flanger_demo : el.phaser2_demo :> fl.spectral_level_demo <: _,_;
+
+fx_stack =
+ vgroup("[1]", ol.sawtooth_demo) <:
+ vgroup("[2]", el.flanger_demo) :
+ vgroup("[3]", el.phaser2_demo);
+
+level_viewer(x,y) = attach(x,vgroup("[4]", fl.spectral_level_demo(x+y))),y;
+
+process = fx_stack : level_viewer;