diff --git a/ambience.lua b/ambience.lua
new file mode 100644
index 0000000..a7165df
--- /dev/null
+++ b/ambience.lua
@@ -0,0 +1,45 @@
+
+-- mushroom biome
+
+ambience.add_set("ethereal_mushroom", {
+
+	frequency = 40,
+
+	sounds = {
+		{name = "ethereal_mushroom", length = 1.3, ephemeral = true},
+		{name = "ethereal_mushroom", length = 1.3, pitch = 0.9, ephemeral = true},
+		{name = "ethereal_mushroom", length = 1.3, pitch = 1.2, ephemeral = true},
+	},
+
+	nodes = ({"ethereal:mushroom_trunk"}),
+
+	sound_check = function(def)
+
+		local c = (def.totals["ethereal:mushroom_trunk"] or 0)
+
+		if c > 30 then return "ethereal_mushroom" end
+	end
+})
+
+-- frost biome
+
+ambience.add_set("ethereal_crystal", {
+
+	frequency = 50,
+
+	sounds = {
+		{name = "ethereal_crystal", length = 2.3, gain = 2.0, ephemeral = true},
+		{name = "ethereal_crystal", length = 2.3, gain = 2.0, pitch = 0.9, ephemeral = true},
+		{name = "ethereal_crystal", length = 2.3, gain = 2.0, pitch = 1.1, ephemeral = true},
+	},
+
+	nodes = ({"ethereal:crystal_spike", "ethereal:crystal_dirt"}),
+
+	sound_check = function(def)
+
+		local c = (def.totals["ethereal:crystal_spike"] or 0)
+		local d = (def.totals["ethereal:crystal_dirt"] or 0)
+
+		if c > 0 and d > 70 then return "ethereal_crystal" end
+	end
+})
diff --git a/init.lua b/init.lua
index c1206a4..38aa68c 100644
--- a/init.lua
+++ b/init.lua
@@ -165,4 +165,10 @@ else -- or return to where it came from
 	minetest.register_alias("ethereal:bonemeal", "default:dirt")
 end
 
+-- ambience lite
+
+if minetest.get_modpath("ambience") then
+	dofile(path .. "/ambience.lua")
+end
+
 print ("[MOD] Ethereal loaded")
diff --git a/leaves.lua b/leaves.lua
index 30d4826..cc66143 100644
--- a/leaves.lua
+++ b/leaves.lua
@@ -603,9 +603,9 @@ decay({"ethereal:olive_trunk"}, {"ethereal:olive_leaves", "ethereal:olive"}, 3)
 decay({"ethereal:mushroom_trunk"}, {"ethereal:mushroom", "ethereal:mushroom_brown",
 		"ethereal:mushroom_pore", "ethereal:lightstring"}, 4)
 
-if minetest.settings:get_bool("ethereal.leaf_particles") ~= false then
+-- falling leaf particles
 
-	-- falling leaf effect
+if minetest.settings:get_bool("ethereal.leaf_particles") ~= false then
 
 	local leaf_list = {
 		{"ethereal:frost_leaves", "331b37", 9},
diff --git a/license.txt b/license.txt
index 72e0458..ea1604a 100644
--- a/license.txt
+++ b/license.txt
@@ -214,3 +214,9 @@ Created by XSSheep (CC BY-SA 4.0 - https://minecraft.curseforge.com/projects/pix
 
 Sound by I_q (Attribution 3.0) https://freesound.org/people/l_q/sounds/440956/
   ethereal_casting_rod.ogg
+
+Sounds by eZZin (CC0) https://freesound.org/people/eZZin/sounds/667122/
+  ethereal_mushroom.ogg
+
+Sound by Kostrava (CC0) https://freesound.org/people/Kostrava/sounds/333988/
+  ethereal_crystal.ogg
diff --git a/sounds/ethereal_crystal.ogg b/sounds/ethereal_crystal.ogg
new file mode 100644
index 0000000..3962fa7
Binary files /dev/null and b/sounds/ethereal_crystal.ogg differ
diff --git a/sounds/ethereal_mushroom.ogg b/sounds/ethereal_mushroom.ogg
new file mode 100644
index 0000000..6fa86d9
Binary files /dev/null and b/sounds/ethereal_mushroom.ogg differ