diff --git a/oregano/instrument.rkt b/oregano/instrument.rkt
new file mode 100644
index 0000000..2010b4b
--- /dev/null
+++ b/oregano/instrument.rkt
@@ -0,0 +1,25 @@
+#lang racket
+
+
+(require rsc3 rhs/rhs)
+
+(define sin-instrument
+  (letc ([bus 0]
+         [freq 440])
+        (out bus (mul 0.2 (sin-osc ar freq 0)))))
+
+
+;; setup
+(send-synth fd "sin-inst" sin-instrument)
+
+
+  
+(define (make-instrument ins)
+  (match ins
+    ['sin (begin
+            (with-sc3 (lanbda (fd)
+                              (send fd
+                                    (s-new "sin-inst" -1 1 1
+                                                            
+                              ]
+    [else (error "unknown instrument used")]))h
\ No newline at end of file