diff --git a/assets/fmod20221/cdef.lua b/assets/fmod20221/cdef.lua
index 4c01efcd..fd7b80ee 100644
--- a/assets/fmod20221/cdef.lua
+++ b/assets/fmod20221/cdef.lua
@@ -1,4 +1,4 @@
-require("ffi").cdef[[
+require'ffi'.cdef[[
 typedef int FMOD_BOOL;
 typedef struct FMOD_SYSTEM FMOD_SYSTEM;
 typedef struct FMOD_SOUND FMOD_SOUND;
diff --git a/assets/fmod20221/constants.lua b/assets/fmod20221/constants.lua
index bdbe6015..e190358c 100644
--- a/assets/fmod20221/constants.lua
+++ b/assets/fmod20221/constants.lua
@@ -1,9 +1,9 @@
-local bit=require("bit")
-local ffi=require("ffi")
+local bit=require'bit'
+local ffi=require'ffi'
 local require=simpRequire(((...):gsub("[^%.]*$", "")))
 
 ---@class FMOD.Master
-local M=require("master")
+local M=require'master'
 
 M.FMOD_VERSION=0x00020221
 M.FMOD_DEBUG_LEVEL_NONE=0x00000000
diff --git a/assets/fmod20221/enums.lua b/assets/fmod20221/enums.lua
index da16e1db..cbd84e9b 100644
--- a/assets/fmod20221/enums.lua
+++ b/assets/fmod20221/enums.lua
@@ -1,7 +1,7 @@
 local require=simpRequire(((...):gsub("[^%.]*$", "")))
 
 ---@class FMOD.Master
-local M=require("master")
+local M=require'master'
 local C=M.C
 
 M.FMOD_THREAD_TYPE_MIXER=C.FMOD_THREAD_TYPE_MIXER
diff --git a/assets/fmod20221/errors.lua b/assets/fmod20221/errors.lua
index 60e80395..e29cf27f 100644
--- a/assets/fmod20221/errors.lua
+++ b/assets/fmod20221/errors.lua
@@ -1,7 +1,7 @@
 local require=simpRequire(((...):gsub("[^%.]*$", "")))
 
 ---@class FMOD.Master
-local M=require("master")
+local M=require'master'
 
 M.errorString=setmetatable({
     [M.FMOD_OK]="No errors.",
diff --git a/assets/fmod20221/init.lua b/assets/fmod20221/init.lua
index 0692cae2..f20273cf 100644
--- a/assets/fmod20221/init.lua
+++ b/assets/fmod20221/init.lua
@@ -1,28 +1,29 @@
-local ffi=require("ffi")
+local ffi=require'ffi'
 local require=simpRequire(((...):gsub(".init$","").."."))
 
-require("cdef")
+require'cdef'
 
 ---@class FMOD.Master
-local M=require("master")
-
--- search for fmod shared libraries in package.cpath
-local fmodPath=package.searchpath("fmod",package.cpath)
-local fmodstudioPath=package.searchpath("fmodstudio",package.cpath)
-
-if fmodPath and fmodstudioPath then
-    -- pretend to load libfmod through Lua (it's going to fail but not raise any errors) so that its location is known when loading libfmodstudio through ffi
-    -- package.loadlib(fmodPath,"")
-    M.C=ffi.load(fmodPath)
-    M.C2=ffi.load(fmodstudioPath)
-    require("enums")
-    require("constants")
-    require("wrap")
-    require("errors")
-else
-    MSG.new('error',"FMOD shared libraries not found!")
-end
-
+local M=require'master'
+
+-- (Old method) search for fmod shared libraries in package.cpath
+-- local fmodPath=package.searchpath('fmod',package.cpath)
+-- local fmodstudioPath=package.searchpath('fmodstudio',package.cpath)
+-- -- pretend to load libfmod through Lua (it's going to fail but not raise any errors) so that its location is known when loading libfmodstudio through ffi
+-- -- package.loadlib(fmodPath,"")
+-- M.C=ffi.load(fmodPath)
+-- M.C2=ffi.load(fmodstudioPath)
+
+M.C=ffi.load('fmod')
+if not M.C then MSG.new('error',"FMOD library not found") end
+
+M.C2=ffi.load('fmodstudio')
+if not M.C2 then MSG.new('error',"FMODstudio library not found") end
+
+require'enums'
+require'constants'
+require'wrap'
+require'errors'
 
 --------------------------------------------------------------
 
diff --git a/assets/fmod20221/wrap.lua b/assets/fmod20221/wrap.lua
index 69adb546..5e80486b 100644
--- a/assets/fmod20221/wrap.lua
+++ b/assets/fmod20221/wrap.lua
@@ -1,4 +1,4 @@
-local ffi=require("ffi")
+local ffi=require'ffi'
 local require=simpRequire(((...):gsub("[^%.]*$", "")))
 
 ---@alias FMOD.GUID FMOD.GUID
@@ -7,7 +7,7 @@ local require=simpRequire(((...):gsub("[^%.]*$", "")))
 ---@alias FMOD.Enum FMOD.Enum
 
 ---@class FMOD.Master
-local M=require("master")
+local M=require'master'
 local C=M.C
 local C2=M.C2
 
diff --git a/assets/gamefunc.lua b/assets/gamefunc.lua
index f72e2086..bd2f1a9c 100644
--- a/assets/gamefunc.lua
+++ b/assets/gamefunc.lua
@@ -46,6 +46,7 @@ function playSample(...)
                 volume=vol,
                 param={'release',rel*1.0594630943592953^(note-33)},
             })
+            if not event then return end
             TASK.new(function()
                 DEBUG.yieldT(len/1000)
                 event:stop(FMOD.FMOD_STUDIO_STOP_ALLOWFADEOUT)
diff --git a/assets/scene/dictionary.lua b/assets/scene/dictionary.lua
index 7c7c843e..cba5c93a 100644
--- a/assets/scene/dictionary.lua
+++ b/assets/scene/dictionary.lua
@@ -31,7 +31,7 @@ local contents={
 }
 -- Base dict data, not formatted
 local baseDict do
-    baseDict=require('assets/dict_base')
+    baseDict=require'assets/dict_base'
     local dictObjMeta={__index=function(obj,k)
         if k=='titleText' then
             obj.titleText=GC.newText(FONT.get(obj.titleSize,'bold'),obj.titleFull)
diff --git a/assets/songbook.lua b/assets/songbook.lua
index 7b9b23ad..09f25c2a 100644
--- a/assets/songbook.lua
+++ b/assets/songbook.lua
@@ -1,3 +1,11 @@
+---@class Techmino.MusicMeta
+---@field message string
+---@field author string
+---@field title string
+---@field inside? boolean
+---@field redirect? string|table<string>
+---@field notFound? boolean
+
 ---@enum (key) Techmino.MusicName
 local songbook={
     ['8-bit happiness']          ={},
@@ -116,4 +124,5 @@ setmetatable(songbook,{__call=function(t,name)
     }
 end})
 
+---@cast songbook table<Techmino.MusicName,Techmino.MusicMeta>
 return songbook
diff --git a/conf.lua b/conf.lua
index 056ee3f9..d6c4feed 100644
--- a/conf.lua
+++ b/conf.lua
@@ -51,7 +51,7 @@ function love.conf(t)
         W.width,W.height=1440,900
         W.minwidth,W.minheight=288,180
     end
-    W.title=require"version".appName.."  "..require"version".appVer
+    W.title=require'version'.appName..'  '..require'version'.appVer
 
     if fs.getInfo('assets/image/icon.png') then
         W.icon='assets/image/icon.png'
diff --git a/main.lua b/main.lua
index 37de8678..c6488798 100644
--- a/main.lua
+++ b/main.lua
@@ -25,7 +25,7 @@
 -------------------------------------------------------------
 -- Load Zenitha
 
-require("Zenitha")
+require'Zenitha'
 DEBUG.checkLoadTime("Load Zenitha")
 -- DEBUG.runVarMonitor()
 -- DEBUG.setCollectGarvageVisible()
@@ -37,7 +37,7 @@ STRING.install()
 math.randomseed(os.time()*626)
 love.setDeprecationOutput(false)
 love.keyboard.setTextInput(false)
-VERSION=require"version"
+VERSION=require'version'
 
 --------------------------------------------------------------
 -- Create directories
@@ -420,10 +420,15 @@ TASK.new(function() -- Don't initialize studio at first frame, may cause some we
     FMODLoadFunc()
     FMOD.setMainVolume(SETTINGS.system.mainVol,true)
     for name,data in next,SONGBOOK do
-        data.intensity=FMOD.music.getParamDesc(name,'intensity')~=nil
-        data.section=FMOD.music.getParamDesc(name,'section')~=nil
-        if not FMOD.music.getParamDesc(name,'fade') then
-            MSG.new('warn',"Missing fade parameter in music '"..name.."'")
+        if FMOD.music.getDesc(name) then
+            data.intensity=FMOD.music.getParamDesc(name,'intensity')~=nil
+            data.section=FMOD.music.getParamDesc(name,'section')~=nil
+            if not FMOD.music.getParamDesc(name,'fade') then
+                MSG.new('warn',"Missing 'fade' parameter in music '"..name.."'")
+            end
+        else
+            data.notFound=true
+            MSG.new('warn',"Music '"..name.."' not found in FMOD")
         end
     end
 end)