Add piston sounds

mods/ITEMS/REDSTONE/README

@@ -12,6 +12,7 @@ sfan5: coding, textures
 temperest: coding, textures
 Jordach: Sounds for the noteblock
 minerd247: Some textures
+suzenako: Piston sounds
 ...other contributors
 
 This is a mod for minetest-c55.
@@ -22,3 +23,6 @@ You can remove modules of this mod by deleting the mesecons_*
 folders in the minetest-mod-mesecons directory.
 
 Mod dependencies: none
+
+Code license: LGPLv3 or later
+Media license: CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0/>

mods/ITEMS/REDSTONE/mesecons_pistons/init.lua

@@ -64,6 +64,11 @@ local piston_remove_pusher = function (pos, node)
 	if pushername == pistonspec.pusher then --make sure there actually is a pusher (for compatibility reasons mainly)
 		minetest.remove_node(pusherpos)
 		core.check_for_falling(pusherpos)
+		minetest.sound_play("piston_retract", {
+			pos = pos,
+			max_hear_distance = 20,
+			gain = 0.3,
+		})
 	end
 end
 
@@ -77,6 +82,11 @@ local piston_on = function (pos, node)
 		minetest.add_node(pos, {param2 = node.param2, name = pistonspec.onname})
 		minetest.add_node(np, {param2 = node.param2, name = pistonspec.pusher})
 		mesecon:mvps_process_stack(stack)
+		minetest.sound_play("piston_extend", {
+			pos = pos,
+			max_hear_distance = 20,
+			gain = 0.3,
+		})
 	end
 end