diff --git a/gtk2_ardour/automation_controller.cc b/gtk2_ardour/automation_controller.cc
index 91009bf487..d6c3d5b824 100644
--- a/gtk2_ardour/automation_controller.cc
+++ b/gtk2_ardour/automation_controller.cc
@@ -76,9 +76,15 @@ AutomationController::create(
 		const Evoral::Parameter& param,
 		boost::shared_ptr<AutomationControl> ac)
 {
-	Gtk::Adjustment* adjustment = manage (new Gtk::Adjustment (param.normal(), param.min(), param.max(),
-								   (param.max() - param.min())/100.0,
-								   (param.max() - param.min())/10.0));
+	Gtk::Adjustment* adjustment = manage (
+		new Gtk::Adjustment (
+			ac->internal_to_interface (param.normal()),
+			ac->internal_to_interface (param.min()),
+			ac->internal_to_interface (param.max()),
+			(param.max() - param.min()) / 100.0,
+			(param.max() - param.min()) / 10.0
+			)
+		);
 
         assert (ac);
         assert(ac->parameter() == param);
diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc
index b038cde695..b74a57dbce 100644
--- a/libs/ardour/amp.cc
+++ b/libs/ardour/amp.cc
@@ -458,3 +458,16 @@ Amp::visible() const
 {
 	return true;
 }
+
+std::string
+Amp::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+{
+	if (ac == _gain_control) {
+		char buffer[32];
+		snprintf (buffer, sizeof (buffer), "%.2fdB", ac->internal_to_user (ac->get_value ()));
+		return buffer;
+	}
+
+	return Automatable::value_as_string (ac);
+}
+	
diff --git a/libs/ardour/ardour/amp.h b/libs/ardour/ardour/amp.h
index 398d43ee3e..fa2eb98ebf 100644
--- a/libs/ardour/ardour/amp.h
+++ b/libs/ardour/ardour/amp.h
@@ -98,6 +98,8 @@ public:
 		return _gain_control;
 	}
 
+	std::string value_as_string (boost::shared_ptr<AutomationControl>) const;
+	
 private:
 	bool   _denormal_protection;
 	bool   _apply_gain;