diff --git a/chest.lua b/chest.lua
index 411c171..d5f9727 100644
--- a/chest.lua
+++ b/chest.lua
@@ -43,7 +43,7 @@ minetest.register_node("scifi_nodes:crate", {
 	groups = {cracky = 1, oddly_breakable_by_hand = 2, fuel = 8},
 	legacy_facedir_simple = true,
 	is_ground_content = false,
-	sounds = default.node_sound_wood_defaults(),
+	sounds = scifi_nodes.node_sound_wood_defaults(),
 
 	after_dig_node = drop_chest_stuff(),
 	on_construct = function(pos)
@@ -82,7 +82,7 @@ minetest.register_node("scifi_nodes:box", {
 	groups = {cracky = 1},
 	legacy_facedir_simple = true,
 	is_ground_content = false,
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 
 	after_dig_node = drop_chest_stuff(),
 	on_construct = function(pos)
diff --git a/digicode.lua b/digicode.lua
index 8c9259b..0607389 100644
--- a/digicode.lua
+++ b/digicode.lua
@@ -129,7 +129,7 @@ minetest.register_node("scifi_nodes:digicode_on", {
 		}
 	},
 	on_timer = toggle_digicode,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:digicode_off", {
@@ -152,7 +152,7 @@ minetest.register_node("scifi_nodes:digicode_off", {
 	},
 	after_place_node = set_owner,
 	on_rightclick = show_digicode_formspec,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_craft({
diff --git a/init.lua b/init.lua
index 51b8e04..5388925 100644
--- a/init.lua
+++ b/init.lua
@@ -4,6 +4,9 @@ scifi_nodes = {}
 
 local MP = minetest.get_modpath("scifi_nodes")
 
+
+dofile(MP.."/sounds.lua")
+
 if minetest.get_modpath("xpanes") then
 	dofile(MP.."/panes.lua")
 end
diff --git a/nodeboxes.lua b/nodeboxes.lua
index 828ff16..47287fc 100644
--- a/nodeboxes.lua
+++ b/nodeboxes.lua
@@ -32,7 +32,7 @@ minetest.register_node("scifi_nodes:alienslope", {
 			{-0.125, 0.375, -0.5, 0.5, 0.5, 0.5}, -- NodeBox17
 		}
 	},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = scifi_nodes.node_sound_wood_defaults(),
 	on_place = minetest.rotate_node
 })
 
@@ -62,7 +62,7 @@ minetest.register_node("scifi_nodes:wallpipe", {
 			{-0.5, -0.125, 0, 0.5, 0, 0.0625}, -- NodeBox24
 		}
 	},
-	sounds = default.node_sound_wood_defaults()
+	sounds = scifi_nodes.node_sound_wood_defaults()
 })
 
 minetest.register_node("scifi_nodes:plant_trap", {
@@ -91,7 +91,7 @@ minetest.register_node("scifi_nodes:plant_trap", {
 			{-0.0625, -0.5, 0.3125, 0, 0.5, 0.375}, -- NodeBox28
 		}
 	},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = scifi_nodes.node_sound_wood_defaults(),
 })
 
 minetest.register_node("scifi_nodes:egg", {
@@ -122,7 +122,7 @@ minetest.register_node("scifi_nodes:egg", {
 			{-0.125, 0.75, -0.125, 0.125, 0.8125, 0.125}, -- NodeBox8
 			{-0.375, -0.3125, -0.4375, 0.375, 0.3125, 0.4375}, -- NodeBox9
 		},
-	sounds = default.node_sound_wood_defaults()
+	sounds = scifi_nodes.node_sound_wood_defaults()
 	}
 })
 
@@ -264,7 +264,7 @@ minetest.register_node("scifi_nodes:pad", {
 			{-0.875, -0.5, -0.8125, 0.8125, -0.375, 0.8125}, -- NodeBox3
 			{-0.8125, -0.5, -0.75, 0.75, -0.3125, 0.75}, -- NodeBox4
 		},
-	sounds = default.node_sound_wood_defaults()
+	sounds = scifi_nodes.node_sound_wood_defaults()
 	}
 })
 
@@ -283,7 +283,7 @@ minetest.register_node("scifi_nodes:pplwndw", {
 	paramtype2 = "facedir",
 	use_texture_alpha = "blend",
 	groups = {cracky=3},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	node_box = {
 		type = "fixed",
 		fixed = {
@@ -354,7 +354,7 @@ minetest.register_node("scifi_nodes:pot_lid", {
 			{-0.1875, -0.3125, -0.1875, 0.1875, -0.25, 0.1875}
 		}
 	},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 local function toggle_lid(pos, node, player, itemstack)
@@ -407,7 +407,7 @@ minetest.register_node("scifi_nodes:pot", {
 	},
 	on_rightclick = toggle_lid,
 	on_destruct = remove_lid,
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 })
 
 minetest.register_node("scifi_nodes:pot2", {
@@ -439,7 +439,7 @@ minetest.register_node("scifi_nodes:pot2", {
 	},
 	on_rightclick = toggle_lid,
 	on_destruct = remove_lid,
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 })
 
 minetest.register_node("scifi_nodes:lightbar", {
@@ -465,7 +465,7 @@ minetest.register_node("scifi_nodes:lightbar", {
 		}
 	},
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:light_dynamic", {
@@ -490,7 +490,7 @@ minetest.register_node("scifi_nodes:light_dynamic", {
 	paramtype2 = "wallmounted",
 	light_source = minetest.LIGHT_MAX,
 	groups = {cracky=1, oddly_breakable_by_hand=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:ladder", {
@@ -520,7 +520,7 @@ minetest.register_node("scifi_nodes:ladder", {
 			{0.3125, -0.5, 0.0625, 0.4375, -0.375, 0.1875}, -- NodeBox25
 			{0.3125, -0.5, -0.1875, 0.4375, -0.375, -0.0625}, -- NodeBox26
 		},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 	},
 	paramtype2 = "wallmounted",
 	walkable = false,
@@ -547,7 +547,7 @@ minetest.register_node("scifi_nodes:lightbars", {
 		}
 	},
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:liquid_pipe", {
@@ -568,7 +568,7 @@ tiles = {{
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:liquid_pipe2", {
@@ -588,7 +588,7 @@ tiles = {
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:powered_stand", {
@@ -655,7 +655,7 @@ minetest.register_node("scifi_nodes:cover", {
 			{-0.3125, -0.375, -0.3125, 0.3125, -0.3125, 0.3125}, -- NodeBox6
 		}
 	},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = scifi_nodes.node_sound_wood_defaults(),
 	groups = {cracky=1, oddly_breakable_by_hand=1}
 })
 
@@ -760,7 +760,7 @@ minetest.register_node("scifi_nodes:table", {
 			{-0.0625, 0.25, -0.125, 0.0625, 0.4375, -0.0625}, -- NodeBox7
 		}
 	},
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 	groups = {cracky=1}
 })
 
@@ -876,7 +876,7 @@ minetest.register_node("scifi_nodes:windowcorner", {
 	},
 	groups = {cracky=1},
 	on_place = minetest.rotate_node,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:windowstraight", {
@@ -903,7 +903,7 @@ minetest.register_node("scifi_nodes:windowstraight", {
 	},
 	groups = {cracky=1},
 	on_place = minetest.rotate_node,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:windowcorner2", {
@@ -934,7 +934,7 @@ minetest.register_node("scifi_nodes:windowcorner2", {
 	},
 	groups = {cracky=1},
 	on_place = minetest.rotate_node,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:windowstraight2", {
@@ -961,7 +961,7 @@ minetest.register_node("scifi_nodes:windowstraight2", {
 	},
 	groups = {cracky=1},
 	on_place = minetest.rotate_node,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 
@@ -990,7 +990,7 @@ minetest.register_node("scifi_nodes:capsule", {
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = function(pos, node, clicker, item, _)
 			minetest.set_node(pos, {name="scifi_nodes:capsule2", param2=node.param2})
 	end,
@@ -1020,7 +1020,7 @@ minetest.register_node("scifi_nodes:capsule3", {
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = function(pos, node, clicker, item, _)
 			minetest.set_node(pos, {name="scifi_nodes:capsule", param2=node.param2})
 	end,
@@ -1050,7 +1050,7 @@ minetest.register_node("scifi_nodes:capsule2", {
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = function(pos, node, clicker, item, _)
 			minetest.set_node(pos, {name="scifi_nodes:capsule3", param2=node.param2})
 	end,
@@ -1138,7 +1138,7 @@ minetest.register_node("scifi_nodes:glassscreen", {
 		}
 	},
 	groups = {cracky=1, oddly_breakable_by_hand=1},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 
@@ -1221,5 +1221,5 @@ minetest.register_node("scifi_nodes:windowpanel", {
     },
     groups = {cracky=1},
     on_place = minetest.rotate_node,
-    sounds = default.node_sound_glass_defaults(),
+    sounds = scifi_nodes.node_sound_glass_defaults(),
 })
diff --git a/nodes.lua b/nodes.lua
index 032c5d7..9de2d34 100644
--- a/nodes.lua
+++ b/nodes.lua
@@ -35,7 +35,7 @@ minetest.register_node("scifi_nodes:rfloor", {
 	paramtype2 = "facedir",
 	light_source = 10,
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 minetest.register_node("scifi_nodes:bfloor", {
@@ -47,7 +47,7 @@ minetest.register_node("scifi_nodes:bfloor", {
 	paramtype2 = "facedir",
 	light_source = 10,
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 
@@ -64,7 +64,7 @@ minetest.register_node("scifi_nodes:stripes2", {
 	},
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 minetest.register_node("scifi_nodes:gblock", {
@@ -80,7 +80,7 @@ minetest.register_node("scifi_nodes:gblock", {
 	},
 	paramtype = "light",
 	groups = {cracky=1};
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 minetest.register_node("scifi_nodes:gblock2", {
@@ -97,7 +97,7 @@ minetest.register_node("scifi_nodes:gblock2", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 minetest.register_node("scifi_nodes:gblock3", {
@@ -114,7 +114,7 @@ minetest.register_node("scifi_nodes:gblock3", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 
@@ -133,7 +133,7 @@ minetest.register_node("scifi_nodes:green_light", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:red_light", {
@@ -150,7 +150,7 @@ minetest.register_node("scifi_nodes:red_light", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:discs", {
@@ -166,7 +166,7 @@ minetest.register_node("scifi_nodes:discs", {
 	},
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:disc", {
@@ -196,7 +196,7 @@ minetest.register_node("scifi_nodes:greenbar_animated", {
 	paramtype2 = "facedir",
 	groups = {cracky=1},
 	light_source = 10,
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_place = minetest.rotate_node
 })
 
@@ -210,7 +210,7 @@ minetest.register_node("scifi_nodes:blink", {
 	paramtype = "light",
 	groups = {cracky=1},
 	light_source = 5,
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:black_lights", {
@@ -222,7 +222,7 @@ minetest.register_node("scifi_nodes:black_lights", {
 	}},
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:black_screen", {
@@ -235,7 +235,7 @@ minetest.register_node("scifi_nodes:black_screen", {
 	paramtype = "light",
 	groups = {cracky=1},
 	light_source = 1,
-	sounds = default.node_sound_stone_defaults()
+	sounds = scifi_nodes.node_sound_stone_defaults()
 })
 
 minetest.register_node("scifi_nodes:screen", {
@@ -248,7 +248,7 @@ minetest.register_node("scifi_nodes:screen", {
 	paramtype = "light",
 	groups = {cracky=1},
 	light_source = 5,
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:screen2", {
@@ -261,7 +261,7 @@ minetest.register_node("scifi_nodes:screen2", {
 	paramtype = "light",
 	groups = {cracky=1},
 	light_source = 5,
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 
@@ -280,7 +280,7 @@ minetest.register_node("scifi_nodes:white_pad", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:white_base", {
@@ -297,7 +297,7 @@ minetest.register_node("scifi_nodes:white_base", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:grnpipe", {
@@ -314,7 +314,7 @@ minetest.register_node("scifi_nodes:grnpipe", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 	on_place = minetest.rotate_node
 })
 
@@ -333,7 +333,7 @@ minetest.register_node("scifi_nodes:grnpipe2", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {cracky=1},
-	sounds = default.node_sound_metal_defaults(),
+	sounds = scifi_nodes.node_sound_metal_defaults(),
 	on_place = minetest.rotate_node
 })
 
@@ -349,7 +349,7 @@ minetest.register_node("scifi_nodes:octrng", {
 	use_texture_alpha = "blend",
 	light_source = 10,
 	groups = {cracky=2},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:octgrn", {
@@ -364,7 +364,7 @@ minetest.register_node("scifi_nodes:octgrn", {
 	use_texture_alpha = "blend",
 	light_source = 10,
 	groups = {cracky=2},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:octbl", {
@@ -379,7 +379,7 @@ minetest.register_node("scifi_nodes:octbl", {
 	use_texture_alpha = "blend",
 	light_source = 10,
 	groups = {cracky=2},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:octppl", {
@@ -394,7 +394,7 @@ minetest.register_node("scifi_nodes:octppl", {
 	use_texture_alpha = "blend",
 	light_source = 10,
 	groups = {cracky=2},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:tower", {
@@ -409,7 +409,7 @@ minetest.register_node("scifi_nodes:tower", {
 	inventory_image = "scifi_nodes_tower.png",
 	paramtype = "light",
 	groups = {cracky=2},
-	sounds = default.node_sound_metal_defaults()
+	sounds = scifi_nodes.node_sound_metal_defaults()
 })
 
 minetest.register_node("scifi_nodes:junk", {
@@ -444,7 +444,7 @@ minetest.register_node("scifi_nodes:blumetlight", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 
@@ -457,7 +457,7 @@ minetest.register_node("scifi_nodes:lightstp", {
 	light_source = minetest.LIGHT_MAX,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:blklt2", {
@@ -469,7 +469,7 @@ minetest.register_node("scifi_nodes:blklt2", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:blumetstr", {
@@ -481,7 +481,7 @@ minetest.register_node("scifi_nodes:blumetstr", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:glass", {
@@ -494,7 +494,7 @@ minetest.register_node("scifi_nodes:glass", {
 	use_texture_alpha = "blend",
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:whtlightbnd", {
@@ -506,7 +506,7 @@ minetest.register_node("scifi_nodes:whtlightbnd", {
 	light_source = 10,
 	paramtype = "light",
 	groups = {cracky=1},
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 --edited wool code (Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>)
@@ -619,7 +619,7 @@ for _, row in ipairs(nodetypes) do
 		paramtype = "light",
 		paramtype2 = "facedir",
 		light_source = light,
-		sounds = default.node_sound_glass_defaults()
+		sounds = scifi_nodes.node_sound_glass_defaults()
 	}
 
 	if is_colorable and has_unifieddyes_mod then
@@ -646,7 +646,7 @@ for _, row in ipairs(nodetypes) do
 			paramtype = "light",
 			paramtype2 = "color",
 			light_source = light,
-			sounds = default.node_sound_glass_defaults(),
+			sounds = scifi_nodes.node_sound_glass_defaults(),
 			on_construct = unifieddyes.on_construct,
 			on_dig = unifieddyes.on_dig
 		})
diff --git a/octagon_panes.lua b/octagon_panes.lua
index 68d6a6d..5a6f18c 100644
--- a/octagon_panes.lua
+++ b/octagon_panes.lua
@@ -27,7 +27,7 @@ local function register(basename, description, texture)
     },
     groups = {cracky = 3, oddly_breakable_by_hand = 3},
     use_texture_alpha = "blend",
-    sounds = default.node_sound_glass_defaults()
+    sounds = scifi_nodes.node_sound_glass_defaults()
   })
 
   -- double height
@@ -52,7 +52,7 @@ local function register(basename, description, texture)
     },
     groups = {cracky = 3, oddly_breakable_by_hand = 3},
     use_texture_alpha = "blend",
-    sounds = default.node_sound_glass_defaults()
+    sounds = scifi_nodes.node_sound_glass_defaults()
   })
 
   -- single height with offset
@@ -77,7 +77,7 @@ local function register(basename, description, texture)
     },
     groups = {cracky = 3, oddly_breakable_by_hand = 3},
     use_texture_alpha = "blend",
-    sounds = default.node_sound_glass_defaults()
+    sounds = scifi_nodes.node_sound_glass_defaults()
   })
 
   -- register recipes
diff --git a/palm_scanner.lua b/palm_scanner.lua
index 00dc4bb..e35ad87 100644
--- a/palm_scanner.lua
+++ b/palm_scanner.lua
@@ -65,7 +65,7 @@ minetest.register_node("scifi_nodes:palm_scanner_off", {
 		}
 	},
 	on_rightclick = (has_mesecons and activate_palm_scanner),
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_node("scifi_nodes:palm_scanner_checking", {
@@ -83,7 +83,7 @@ minetest.register_node("scifi_nodes:palm_scanner_checking", {
 	paramtype2 = "wallmounted",
 	groups = {cracky=1, oddly_breakable_by_hand=1, not_in_creative_inventory=1, mesecon_needs_receiver = 1},
 	drop = "scifi_nodes:palm_scanner_off",
-	sounds = default.node_sound_glass_defaults()
+	sounds = scifi_nodes.node_sound_glass_defaults()
 })
 
 minetest.register_node("scifi_nodes:palm_scanner_on", {
@@ -106,7 +106,7 @@ minetest.register_node("scifi_nodes:palm_scanner_on", {
 			state = (has_mesecons and mesecon.state.on)
 		}
 	},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 })
 
 minetest.register_craft({
diff --git a/protected_switch.lua b/protected_switch.lua
index 375c910..462852e 100644
--- a/protected_switch.lua
+++ b/protected_switch.lua
@@ -51,7 +51,7 @@ minetest.register_node("scifi_nodes:protected_switch_on", {
 			state = (has_mesecons and mesecon.state.on)
 		}
 	},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = (has_mesecons and toggle_switch),
 	on_timer = (has_mesecons and toggle_switch)
 })
@@ -78,7 +78,7 @@ minetest.register_node("scifi_nodes:protected_switch_off", {
 			state = (has_mesecons and mesecon.state.off)
 		}
 	},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = (has_mesecons and toggle_switch)
 })
 
diff --git a/sounds.lua b/sounds.lua
new file mode 100644
index 0000000..897e3d9
--- /dev/null
+++ b/sounds.lua
@@ -0,0 +1,29 @@
+-- sound definitions
+
+function scifi_nodes.node_sound_wood_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_wood_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_glass_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_glass_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_metal_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_metal_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_stone_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_stone_defaults()
+    end
+end
\ No newline at end of file
diff --git a/switch.lua b/switch.lua
index 2383a84..8a965d4 100644
--- a/switch.lua
+++ b/switch.lua
@@ -44,7 +44,7 @@ minetest.register_node("scifi_nodes:switch_on", {
 			state = (has_mesecons and mesecon.state.on)
 		}
 	},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = (has_mesecons and toggle_switch),
 	on_timer = (has_mesecons and toggle_switch)
 })
@@ -71,7 +71,7 @@ minetest.register_node("scifi_nodes:switch_off", {
 			state = (has_mesecons and mesecon.state.off)
 		}
 	},
-	sounds = default.node_sound_glass_defaults(),
+	sounds = scifi_nodes.node_sound_glass_defaults(),
 	on_rightclick = (has_mesecons and toggle_switch)
 })