2 files changed, 4 insertions, 4 deletions
diff --git a/drumgizmo/input/test.cc b/drumgizmo/input/test.cc
index a611256..1315c46 100644
--- a/drumgizmo/input/test.cc
+++ b/drumgizmo/input/test.cc
@@ -42,12 +42,12 @@ TestInputEngine::~TestInputEngine()
 {
 }
 
-bool TestInputEngine::init(Instruments& instruments)
+bool TestInputEngine::init(const Instruments& instruments)
 {
   return true;
 }
 
-void TestInputEngine::setParm(std::string parm, std::string value)
+void TestInputEngine::setParm(const std::string& parm, const std::string& value)
 {
 /*
 	if(parm == "probability")
diff --git a/drumgizmo/input/test.h b/drumgizmo/input/test.h
index 2f5e482..7e88cb5 100644
--- a/drumgizmo/input/test.h
+++ b/drumgizmo/input/test.h
@@ -38,8 +38,8 @@ public:
 	~TestInputEngine();
 
 	// based on AudioInputEngine
-	bool init(Instruments& instruments) override;
-	void setParm(std::string parm, std::string value) override;
+	bool init(const Instruments& instruments) override;
+	void setParm(const std::string& parm, const std::string& value) override;
 	bool start() override;
 	void stop() override;
 	void pre() override;