diff --git a/music-articulation.cabal b/music-articulation.cabal
--- a/music-articulation.cabal
+++ b/music-articulation.cabal
@@ -1,6 +1,6 @@
 
 name:                   music-articulation
-version:                1.7.1
+version:                1.7.2
 author:                 Hans Hoglund
 maintainer:             Hans Hoglund
 license:                BSD3
@@ -22,8 +22,7 @@
 
 library
     build-depends:      base                    >= 4 && < 5,
-                        time,
-                        random,
+                        average                 >= 0.6 && < 1,
                         semigroups              >= 0.13.0.1 && < 1,
                         semigroupoids
     exposed-modules:    Music.Articulation
diff --git a/src/Music/Articulation.hs b/src/Music/Articulation.hs
--- a/src/Music/Articulation.hs
+++ b/src/Music/Articulation.hs
@@ -13,8 +13,9 @@
 --
 -------------------------------------------------------------------------------------
 
-module Music.Articulation -- (
--- )
+module Music.Articulation (
+  Articulation,
+)
 where
 
 import Data.Maybe
@@ -22,7 +23,9 @@
 import Data.Semigroup
 import Control.Monad
 import Control.Applicative
+import Data.Monoid.Average
 
+type Articulation = (Average Double, Average Double)
 
 {-
 
@@ -188,3 +191,4 @@
   Caesura
   
 -}
+