--- /dev/null
+ol = library("oscillator.lib");
+fl = library("filter.lib");
+el = library("effect.lib");
+process =
+// ol.oscr_demo : el.cubicnl_demo : fl.spectral_level_demo <: _,_;
+ vgroup("[1]",ol.oscr_demo) :
+ vgroup("[2]",el.cubicnl_demo) :
+ vgroup("[3]",fl.spectral_level_demo) <: _,_;