diff --git a/rsc3/examples/bus-routing.rkt b/rsc3/examples/bus-routing.rkt
new file mode 100644
index 0000000..978cf63
--- /dev/null
+++ b/rsc3/examples/bus-routing.rkt
@@ -0,0 +1,22 @@
+#lang racket
+
+
+(require rsc3 rhs/rhs)
+(with-sc3 reset)
+
+
+;; test 
+(let* ([freq (mouse-x kr 600 2000 1 0.1)]
+       [sig (mul (sin-osc ar
+                          (mul-add (lf-pulse ar 15 0 0.5) 200 freq)
+                          0)
+                      (key-state kr 38 0 0.1 0.1))])
+  (audition (out 16 sig)))
+
+(audition (out 0 (free-verb (in 1 ar 16) 0.5
+                            (mouse-y kr 0 1 0 0.1)
+                            0.5)))
+
+
+
+