Simplify module structure

README.md

@@ -15,7 +15,7 @@ With Löve2D 0.9:
 local sfxr = require("sfxr")
 
 function love.load()
-    local sound = sfxr.new()
+    local sound = sfxr.newSound()
     sound:randomize()
     love.audio.newSource(sound:generateSoundData()):play()
 end
@@ -29,7 +29,7 @@ local sfxr = require("sfxr")
 local driverId = ao.defaultDriverId()
 local device = ao.openLive(driverId, {bits = 16, rate = 44100, channels = 1})
 
-local sound = sfxr.new()
+local sound = sfxr.newSound()
 sound:randomize()
 
 local buffer = sound:generateString()

sfxr.lua

@@ -22,13 +22,6 @@ SOFTWARE.
 ]]--
 
 local sfxr = {}
-sfxr.__index = sfxr
-
-local function new()
-    local obj = setmetatable({}, sfxr)
-    obj:__init()
-    return obj
-end
 
 -- Constants
 
@@ -63,9 +56,12 @@ local function cpypol(a, b)
     end
 end
 
--- Class functions
+-- The main Sound class
 
-function sfxr:__init()
+sfxr.Sound = {}
+sfxr.Sound.__index = sfxr.Sound
+
+function sfxr.Sound:__init()
     -- Build tables to store the parameters in
     self.volume = {}
     self.envelope = {}
@@ -193,12 +189,12 @@ function sfxr:generate()
     end
 end
 
+-- Constructor
 
-sfxr:__init()
+function sfxr.newSound(...)
+    local instance = setmetatable({}, sfxr.Sound)
+    instance:__init(...)
+    return instance
+end
 
-return setmetatable({new = new},
-    {
-        __call = function(_, ...)
-            return new(...)
-        end
-    })
+return sfxr