build 200914. articulated coupler parameters change, driver aid logic tweak, sound overrides support, combined rain sound support

simulationsounds.h

@@ -0,0 +1,23 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include "sound.h"
+
+namespace simulation {
+
+using sound_overridemap = std::unordered_map<std::string, std::string>;
+
+extern sound_overridemap Sound_overrides;
+extern sound_table Sounds;
+
+} // simulation
+
+//---------------------------------------------------------------------------