Some noteblock code cleanup

mesecons_noteblock/init.lua

@@ -62,6 +62,7 @@ mesecon.noteblock_play = function(pos, param2)
 	pos.y = pos.y-1
 	local nodeunder = minetest.get_node(pos).name
 	local soundname = node_sounds[nodeunder]
+	local use_pitch = true
 	local pitch
 	-- Special sounds
 	if not soundname then
@@ -74,15 +75,6 @@ mesecon.noteblock_play = function(pos, param2)
 		end
 	end
 	-- Piano
-	if not soundname then
-		for k,v in pairs(node_sounds_group) do
-			local g = minetest.get_item_group(nodeunder, k)
-			if g ~= 0 then
-				soundname = v
-				break
-			end
-		end
-	end
 	if not soundname then
 		soundname = soundnames[param2]
 		if not soundname then
@@ -92,16 +84,15 @@ mesecon.noteblock_play = function(pos, param2)
 		if nodeunder == "default:steelblock" then
 			soundname = soundname.. 2
 		end
-		pitch = false
+		use_pitch = false
 	end
 	-- Disable pitch for fire and explode because they'd sound too odd
 	if soundname == "fire_fire" or soundname == "tnt_explode" then
-		pitch = false
+		use_pitch = false
 	end
-	if pitch == false then
-		pitch = nil
-	else
+	if use_pitch then
 		-- Calculate pitch
+		-- Adding 1 to param2 because param2=11 is *lowest* pitch sound
 		local val = (param2+1)%12
 		-- All semitones from C to B (analog to piano mode)
 		pitch = 2^((val-6)/12)