maked return result from signal generator

bin/main.cpp

@@ -18,6 +18,6 @@ auto main() -> int
   {
     std::vector<float> s;
     for (auto p : r.m_data) s.push_back(p.m_value[0]);
-    // hack::log()(s);
+    hack::log()(s);
   }
 }