diff --git a/COPYING b/COPYING
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--- /dev/null
+++ b/COPYING
@@ -0,0 +1,26 @@
+
+Copyright (c) 2013, Hans Höglund
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the <organization> nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
diff --git a/Setup.lhs b/Setup.lhs
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+++ b/Setup.lhs
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+#! /usr/bin/env runhaskell
+
+> import Distribution.Simple
+> main = defaultMain
diff --git a/music-pitch.cabal b/music-pitch.cabal
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--- /dev/null
+++ b/music-pitch.cabal
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+
+name:               music-pitch
+version:            1.2
+cabal-version:      >= 1.2
+author:             Hans Hoglund
+maintainer:         Hans Hoglund
+license:            BSD3
+license-file:       COPYING
+synopsis:           Abstract representation of musical pitch.
+category:           Music
+tested-with:        GHC
+build-type:         Simple
+
+description: 
+    Abstract representation of musical pitch.
+    
+    This library is part of the Haskell Music Suite, see <http://musicsuite.github.com>.
+
+library                    
+    build-depends: 
+        base >= 4 && < 5,
+        unix,
+        time,
+        random,
+        semigroups,
+        semigroupoids
+
+    hs-source-dirs: src
+    exposed-modules:
+        Music.Pitch
+        Music.Pitch.Absolute
+        Music.Pitch.Relative
+        Music.Pitch.Intonation
diff --git a/src/Music/Pitch.hs b/src/Music/Pitch.hs
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--- /dev/null
+++ b/src/Music/Pitch.hs
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+
+-------------------------------------------------------------------------------------
+-- |
+-- Copyright   : (c) Hans Hoglund 2012
+--
+-- License     : BSD-style
+--
+-- Maintainer  : hans@hanshoglund.se
+-- Stability   : experimental
+-- Portability : portable
+--
+-- Provides overloaded pitch literals.
+--
+-------------------------------------------------------------------------------------
+
+module Music.Pitch -- (
+-- )
+where
+
+import Data.Maybe
+import Data.Either
+import Data.Semigroup
+import Control.Monad
+import Control.Applicative
+
diff --git a/src/Music/Pitch/Absolute.hs b/src/Music/Pitch/Absolute.hs
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--- /dev/null
+++ b/src/Music/Pitch/Absolute.hs
@@ -0,0 +1,98 @@
+
+{-# LANGUAGE
+    GeneralizedNewtypeDeriving #-}
+
+-------------------------------------------------------------------------------------
+-- |
+-- Copyright   : (c) Hans Hoglund 2012
+--
+-- License     : BSD-style
+--
+-- Maintainer  : hans@hanshoglund.se
+-- Stability   : experimental
+-- Portability : portable
+--
+-- Provides overloaded pitch literals.
+--
+-------------------------------------------------------------------------------------
+
+module Music.Pitch.Absolute -- (
+-- )
+where
+
+import Data.Maybe
+import Data.Either
+import Data.Semigroup
+import Control.Monad
+import Control.Applicative
+
+-- | Frequency in Hertz    
+newtype Frequency = Frequency { getFrequency :: Double }
+    deriving ( Show, Eq, Enum, Num, Ord, Fractional, Floating )
+
+
+-- | Logarithmic pitch reprentation.
+--
+-- > convert (f * 2) = convert f + Octaves 1    
+newtype Octaves = Octaves { getOctaves :: Frequency }
+    deriving ( Show, Eq, Enum, Num, Ord, Fractional, Floating )
+
+-- | Logarithmic pitch reprentation.
+--
+-- > convert (f * 2) = convert f + Octave 1    
+newtype Fifths = Fifths { getFifths :: Frequency }
+    deriving ( Show, Eq, Enum, Num, Ord, Fractional, Floating )
+
+-- | Logarithmic pitch reprentation.    
+--
+-- > convert (f * 2) = convert f + Cent 1200    
+newtype Cents = Cents { getCents :: Frequency }
+    deriving ( Show, Eq, Enum, Num, Ord, Fractional, Floating )
+
+class HasFrequence a where
+    frequency :: a -> Frequency
+
+-- instance Convert Frequency Octave where
+--     convert f             =  Octave (logBase 2 f)
+--     reconvert (Octave f)  =  2 ** f
+-- 
+-- instance Convert Cent Octave where
+--     convert (Cent f)      =  Octave (f / 1200)
+--     reconvert (Octave f)  =  Cent   (f * 1200)
+-- 
+-- instance Convert Frequency Cent where
+--     convert f             =  Cent   (logBase 2 f * 1200)
+--     reconvert (Cent f)    =  2 ** (f / 1200)
+-- 
+-- instance Convert Octave Frequency where
+--     convert = reconvert
+--     reconvert = convert
+-- 
+-- instance Convert Octave Cent where
+--     convert = reconvert
+--     reconvert = convert
+-- 
+-- instance Convert Cent Frequency where
+--     convert = reconvert
+--     reconvert = convert
+    
+
+cents :: HasFrequence a => a -> Cents
+cents = undefined 
+
+fifths :: HasFrequence a => a -> Fifths
+fifths = undefined 
+
+octaves :: HasFrequence a => a -> Octaves
+octaves = undefined 
+
+-- unitFrequency :: Frequency
+-- unitFrequency = 1
+
+-- unitOctave :: Octave
+-- unitOctave = Octave 0
+
+-- unitCent :: Cent
+-- unitCent = Cent 0
+
+                             
diff --git a/src/Music/Pitch/Intonation.hs b/src/Music/Pitch/Intonation.hs
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+++ b/src/Music/Pitch/Intonation.hs
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+
+-------------------------------------------------------------------------------------
+-- |
+-- Copyright   : (c) Hans Hoglund 2012
+--
+-- License     : BSD-style
+--
+-- Maintainer  : hans@hanshoglund.se
+-- Stability   : experimental
+-- Portability : portable
+--
+-- Provides overloaded pitch literals.
+--
+-------------------------------------------------------------------------------------
+
+module Music.Pitch.Intonation -- (
+-- )
+where
+
+import Data.Maybe
+import Data.Either
+import Data.Semigroup
+import Control.Monad
+import Control.Applicative
+
diff --git a/src/Music/Pitch/Relative.hs b/src/Music/Pitch/Relative.hs
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--- /dev/null
+++ b/src/Music/Pitch/Relative.hs
@@ -0,0 +1,25 @@
+
+-------------------------------------------------------------------------------------
+-- |
+-- Copyright   : (c) Hans Hoglund 2012
+--
+-- License     : BSD-style
+--
+-- Maintainer  : hans@hanshoglund.se
+-- Stability   : experimental
+-- Portability : portable
+--
+-- Provides overloaded pitch literals.
+--
+-------------------------------------------------------------------------------------
+
+module Music.Pitch.Relative -- (
+-- )
+where
+
+import Data.Maybe
+import Data.Either
+import Data.Semigroup
+import Control.Monad
+import Control.Applicative
+