diff --git a/nbs5.lua b/nbs5.lua
new file mode 100644
index 0000000..2307fff
--- /dev/null
+++ b/nbs5.lua
@@ -0,0 +1,303 @@
+--[[
+NoteBlock Song API
+by MysticT
+Twekaed by Soni
+Modified for NBS v5 by LDDestroier (WIP)
+--]]
+
+local nbs5 = {}
+
+-- yield to avoid error
+local function yield()
+	os.queueEvent("yield")
+	os.pullEvent("yield")
+end
+
+-- read short integer (16-bit) from file
+local function readShort(file)
+	return file.read() + file.read() * 256
+end
+_G.readShort = readShort
+
+
+-- read integer (32-bit) from file
+local function readInt(file)
+	return file.read() + file.read() * 256 + file.read() * 65536 + file.read() * 16777216
+end
+
+-- read string from file
+local function readString(file)
+	local s, c = ""
+	local len = readInt(file)
+	for i = 1, len do
+		c = file.read()
+		if not c then
+			break
+		end
+		s = s .. string.char(c)
+	end
+	return s
+end
+
+local function makeBitNum(num, bytes)
+	local output = ""
+	for i = 0, bytes - 1 do
+		output = output .. string.char(bit32.band(bit32.rshift(num, i * 8), 0xFF))
+	end
+	return output
+end
+
+-- write short integer (16-bit) to file
+local function writeShort(file, int)
+	file.write(makeBitNum(int, 2))
+end
+
+-- write integer (32-bit) to file
+local function writeInt(file, int)
+	file.write(makeBitNum(int, 4))
+end
+
+-- write string to file
+local function writeString(file, str)
+	writeInt(file, #str)
+	file.write(str)
+end
+
+-- read nbs file header
+local function readNBSHeader(file)
+	local header = {}
+	header.lenght = readShort(file)
+	if header.lenght > 0 then
+		-- old NBS
+		header.nbs_version = 0
+		header.height = readShort(file)
+		header.name = readString(file)
+		if header.name == "" then
+			header.name = "Untitled"
+		end
+		header.author = readString(file)
+		if header.author == "" then
+			header.author = "Unknown"
+		end
+		header.original_author = readString(file)
+		if header.original_author == "" then
+			header.original_author = "Unknown"
+		end
+		header.description = readString(file)
+		header.tempo = readShort(file) / 100
+		header.autosave = file.read()
+		header.autosave_duration = file.read()
+		header.time_signature = file.read()
+		header.minutes_spent = readInt(file)
+		header.left_clicks = readInt(file)
+		header.right_clicks = readInt(file)
+		header.blocks_added = readInt(file)
+		header.blocks_removed = readInt(file)
+		header.filename = readString(file)
+		
+	else
+		-- NBS v5
+		header.nbs_version = file.read()
+		header.vanilla_instruments = file.read()
+		header.lenght = readShort(file)
+		header.height = readShort(file)
+		header.name = readString(file)
+		if header.name == "" then
+			header.name = "Untitled"
+		end
+		header.author = readString(file)
+		if header.author == "" then
+			header.author = "Unknown"
+		end
+		header.original_author = readString(file)
+		if header.original_author == "" then
+			header.original_author = "Unknown"
+		end
+		header.description = readString(file)
+		header.tempo = readShort(file) / 100
+		header.autosave = file.read()
+		header.autosave_duration = file.read()
+		header.time_signature = file.read()
+		header.minutes_spent = readInt(file)
+		header.left_clicks = readInt(file)
+		header.right_clicks = readInt(file)
+		header.blocks_added = readInt(file)
+		header.blocks_removed = readInt(file)
+		header.filename = readString(file)
+		header.looping = file.read()
+		header.max_looping = file.read()
+		header.loop_start = readShort(file)
+		
+	end
+
+	return header
+end
+
+-- jump to the next tick in the file
+local function nextTick(file, tSong)
+	local jump = readShort(file)
+	for i = 1, jump - 1 do
+		tSong[#tSong + 1] = {}
+	end
+	return jump > 0
+end
+
+-- read the notes in a tick
+-- TODO cleanup, move checks to player:nbs.lua
+local function readTick(file)
+	local t = {}
+	local n = 0
+	local jump = readShort(file)
+
+	while jump > 0 do
+		n = n + jump
+		write(".")
+		local instrument = file.read() + 1
+		if instrument > 16 then
+			return nil, "(v5) Can't convert custom instruments"
+		end
+
+		local note = file.read() - 33
+		local velocity = file.read()
+		local pan = file.read()
+		local pitch_mod = readShort(file)
+
+		if note < 0 or note > 24 then
+			return nil, "(v5) Notes must be in Minecraft's 2 octaves (" .. note .. ")"
+		end
+
+		if not t[instrument] then
+			t[instrument] = {}
+		end
+
+		t[instrument][n] = note
+		jump = readShort(file)
+	end
+
+	return t
+end
+
+-- API functions
+
+-- save a converted song to a file
+function nbs5.saveSong(tSong, sPath)
+	local file = fs.open(sPath, "w")
+	if file then
+		file.write(textutils.serialize(tSong))
+		file.close()
+		return true
+	end
+
+	return false, "Error opening file "..sPath
+end
+
+-- save a song as an NBS v5 file
+function nbs5.saveSongNBS(tSong, sPath)
+	
+end
+
+-- load and convert an .nbs file and save it
+function nbs5.load(sPath, bVerbose)
+	local file = fs.open(sPath, "rb")
+	if file then
+		if bVerbose then
+			print("Reading header...")
+		end
+
+		local tSong = {}
+		local header = readNBSHeader(file)
+		tSong.header = header
+		tSong.name = header.name
+		tSong.author = header.author
+		tSong.original_author = header.original_author
+		tSong.lenght = header.lenght / header.tempo
+		tSong.delay = 1 / header.tempo
+
+		if bVerbose then
+			print("Reading ticks...")
+		end
+
+		if header.nbs_version == 0 then
+
+			while nextTick(file, tSong) do
+				local tick, err = readTick(file, tSong)
+				if tick then
+					table.insert(tSong, tick)
+				else
+					file.close()
+					return nil, err
+				end
+				yield()
+			end
+
+			pcall(function()
+				local layers = {}
+				for i=1, header.height do
+					table.insert(layers, {
+						name=readString(file),
+						volume=file.read() + 0
+					})
+				end
+				tSong.layers = layers
+
+				local insts = {}
+				for i=1, file.read() + 0 do
+					insts[#insts + 1] = {
+						name = readString(file),
+						file = readString(file),
+						pitch = file.read() + 0,
+						key = (file.read() + 0) ~= 0
+					}
+				end
+				tSong.instruments = insts
+			end)
+		
+		else
+
+			while nextTick(file, tSong) do
+				local tick, err = readTick(file, tSong)
+				if tick then
+					table.insert(tSong, tick)
+				else
+					file.close()
+					return nil, err
+				end
+				yield()
+			end
+
+			pcall(function()
+				local layers = {}
+				for i=1, header.height do
+					table.insert(layers, {
+						name = readString(file),
+						lock = file.read(),
+						volume = file.read(),
+						pan = file.read()
+					})
+				end
+				tSong.layers = layers
+
+				local insts = {}
+				for i=1, file.read() + 0 do
+					insts[#insts + 1] = {
+						name = readString(file),
+						file = readString(file),
+						pitch = file.read() + 0,
+						key = (file.read() + 0) ~= 0
+					}
+				end
+				tSong.instruments = insts
+			end)
+
+		end
+
+		file.close()
+
+		return tSong
+	end
+
+	return nil, "Error opening file "..sPath
+
+end
+
+return nbs5