diff --git a/abcnotation.cabal b/abcnotation.cabal
--- a/abcnotation.cabal
+++ b/abcnotation.cabal
@@ -1,32 +1,37 @@
 
-name:               abcnotation
-version:            1.6
-cabal-version:      >= 1.2
-author:             Hans Hoglund
-maintainer:         Hans Hoglund
-license:            BSD3
-license-file:       COPYING
-synopsis:           Haskell representation and parser for ABC notation.
-category:           Music
-tested-with:        GHC
-build-type:         Simple
+name:                   abcnotation
+version:                1.6.1
+synopsis:               Haskell representation and parser for ABC notation.
+author:                 Hans Hoglund
+maintainer:             Hans Hoglund
+license:                BSD3
+license-file:           COPYING
+category:               Music
+tested-with:            GHC
+build-type:             Simple
+cabal-version:          >= 1.10
 
-description: 
-    This package contains a Haskell representation and parser for ABC notation. 
+description:
+    This package contains a Haskell representation and parser for ABC notation.
     .
-    ABC notation is a text-based music notation system designed to be comprehensible by both people and 
+    ABC notation is a text-based music notation system designed to be comprehensible by both people and
     computers. For more information see <http://abcnotation.com>.
     .
     Based on the 2.1 standard.
 
-library                    
-    build-depends: 
-        base        >= 4 && < 5,
-        semigroups,
-        prettify,
-        network,
-        parsec
-    hs-source-dirs: src
-    exposed-modules:
-        Music.Abc
-        Music.Abc.Parser
+source-repository head
+  type:                 git
+  location:             git://github.com/music-suite/abcnotation.git
+
+library
+    exposed-modules:    Music.Abc
+                        Music.Abc.Parser
+    build-depends:      base                >= 4 && < 5,
+                        network,
+                        semigroups,
+                        prettify,
+                        parsec,
+                        -- debug
+                        process
+    hs-source-dirs:     src
+    default-language:   Haskell2010
diff --git a/src/Music/Abc.hs b/src/Music/Abc.hs
--- a/src/Music/Abc.hs
+++ b/src/Music/Abc.hs
@@ -80,9 +80,9 @@
 import Data.Ratio
 import Data.Char
 import Data.Semigroup
+import Data.List (intersperse)
 import Text.Pretty hiding (Mode)
 
-
 --------------------------------------------------------------------------------
 
 -- File structure
@@ -154,9 +154,10 @@
         sepBy "\n" (fmap pretty info)
 
 
--- | One line of music code.
+-- | Lines of music code.
 type TuneBody 
     = [Music]
+-- TODO voices, see http://www.barfly.dial.pipex.com/multivoice.txt
 
 
 --------------------------------------------------------------------------------
@@ -183,6 +184,7 @@
     pretty = go
         where
             go (Chord a) = pretty a
+            go (Sequence as) = sepBy " " $ fmap pretty as
     -- FIXME
 
 
@@ -582,76 +584,6 @@
 
 showAbc :: AbcFile -> String
 showAbc = error "Not impl"
-
-
---------------------------------------------------------------------------------
-
--- Tests
-
-{-
-    
-    X:19004
-    T:Silent Night
-    T:Stille Nacht! Heilige Nacht!
-    R:Air
-    C:Franz Xaver Gruber, 1818
-    O:Austria
-    Z:Paul Hardy's Xmas Tunebook 2012 (see www.paulhardy.net). Creative Commons cc by-nc-sa licenced.
-    M:6/8
-    L:1/8
-    Q:3/8=60
-    K:C
-    "C"G>A G E3|G>A G E2z|"G"d2 d B3|"C"c2 c G2z|
-    "F"A2 A c>B A|"C"G>A G E2z|"F"A2 A c>B A|"C"G>A G E2z|
-    "G7"d2 d f>d B|"C"c3 e2z|cGE "G7"G>F D|"C"C3-C3|]
-    W:Silent night, holy night
-    W:All is calm, all is bright
-    W:Round yon Virgin Mother and Child
-    W:Holy Infant so tender and mild
-    W:Sleep in heavenly peace
-    W:Sleep in heavenly peace
-    W:
-    W:(Josef Mohr, 1818, Trans by John Young, 1819)
-    
--}
-test = AbcFile 
-    (Just "1.2")
-    (Just $ FileHeader [
-        Title "Collection"        
-    ] []) 
-    [
-        Tune (AbcTune 
-            (TuneHeader [
-                ReferenceNumber     19004,
-                Title               "Silent Night",
-                Title               "Stille Nacht! Heilige Nacht!",
-                Rhythm              "Air",
-                Composer            "Franz Xaver Gruber, 1818",
-                Origin              "Austria",
-                Source              "Paul Hardy's Xmas Tunebook 2012",
-                Meter               (Simple $ 6/8),
-                UnitNoteLength      (1/8),
-                Tempo               (Tempo_ (Just "Andante", [3/8], 60)),
-                Key                 (Key_ (0, Minor)),            
-
-                Words               "Silent night, holy night",
-                Words               "All is calm, all is bright",
-                Words               "Round yon Virgin Mother and Child",
-                Words               "Holy Infant so tender and mild",
-                Words               "Sleep in heavenly peace",
-                Words               "Sleep in heavenly peace"
-            ]) 
-            [
-                Chord (Chord_ ([(Pitch (C,Just Sharp,0))], Just 1))
-            ])
-
-    ]
-
-main = (putStrLn . show . pretty) test
-
-
-
-
 
 
 showRatio :: (Integral a, Show a) => Ratio a -> String