diff --git a/conf.lua b/conf.lua
index 9fd1e2f8..fe854140 100644
--- a/conf.lua
+++ b/conf.lua
@@ -23,6 +23,7 @@ function love.conf(t)
         local fileData=fs.read('conf/settings')
         if fileData then
             msaa=tonumber(fileData:match('"msaa":(%d+)')) or 0;
+            msaa=msaa==0 and 0 or 2*msaa
             portrait=MOBILE and fileData:find('"portrait":true') and true
         end
     end
diff --git a/main.lua b/main.lua
index 85a687f5..7bfe6b96 100644
--- a/main.lua
+++ b/main.lua
@@ -440,6 +440,7 @@ do
     if SETTING.reTime>3 or SETTING.reTime<.5 then SETTING.reTime=2 end
     if SETTING.locale=='zh_full' then SETTING.locale='zh' end
     if SETTING.vocPack=='rin' then SETTING.vocPack='miku' end
+    if SETTING.msaa>4 then SETTING.msaa=4 end
     if RANKS.infinite then RANKS.infinite=0 end
     if RANKS.infinite_dig then RANKS.infinite_dig=0 end
     if not RANKS.sprint_10l then RANKS.sprint_10l=0 end
diff --git a/parts/scenes/setting_video.lua b/parts/scenes/setting_video.lua
index 6b8f947b..6c8ec220 100644
--- a/parts/scenes/setting_video.lua
+++ b/parts/scenes/setting_video.lua
@@ -91,7 +91,14 @@ scene.widgetList={
     WIDGET.newSwitch{name='clean',        x=950,y=1100,lim=360,disp=SETval('cleanCanvas'),  code=function() SETTING.cleanCanvas=not SETTING.cleanCanvas; applySettings() end},
     WIDGET.newSwitch{name='fullscreen',   x=950,y=1150,lim=360,disp=SETval('fullscreen'),   code=function() SETTING.fullscreen=not SETTING.fullscreen; applySettings() end,hideF=function() return MOBILE end},
     WIDGET.newSwitch{name='portrait',     x=950,y=1150,lim=360,disp=SETval('portrait'),     code=function() SETTING.portrait=not SETTING.portrait; saveSettings(); MES.new('warn',text.settingWarn2,6.26) end,hideF=function() return not MOBILE end},
-    WIDGET.newSlider{name='msaa',         x=950,y=1220,lim=360,w=200,axis={0,4,1},show=_msaaShow,disp=function() return SETTING.msaa==0 and 0 or math.log(SETTING.msaa,2) end,code=function(v) SETTING.msaa=v==0 and 0 or 2^v; saveSettings(); if TASK.lock('warnMessage',6.26) then MES.new('warn',text.settingWarn2,6.26) end end},
+    WIDGET.newSlider{name='msaa',         x=950,y=1220,lim=360,w=200,axis={0,4,1},disp=SETval('msaa'),show=_msaaShow,
+        code=function(v)
+            SETTING.msaa=v
+            if TASK.lock('warnMessage',6.26) then
+                MES.new('warn',text.settingWarn2,6.26)
+            end
+        end
+    },
 
     WIDGET.newKey{name='bg_on',           x=680,y=1290,w=200,h=60,font=25,code=function() SETTING.bg='on' ; applySettings() end},
     WIDGET.newKey{name='bg_off',          x=900,y=1290,w=200,h=60,font=25,code=function() SETTING.bg='off'; applySettings() end},