diff --git a/envelope.cpp b/envelope.cpp
new file mode 100644
index 0000000..173049b
--- /dev/null
+++ b/envelope.cpp
@@ -0,0 +1,17 @@
+#pragma once
+
+namespace Fem {
+  class Envelope {
+    private:
+
+    public:
+    Envelope() {
+
+    }
+
+    uint16_t gen() {
+      
+    }
+
+  };
+}
\ No newline at end of file