diff --git a/examples/break.hs b/examples/break.hs
--- a/examples/break.hs
+++ b/examples/break.hs
@@ -11,7 +11,7 @@
 scoTom = ff' $ line [tom11, tom12]
 scoSnare = mp' $ line [hnr,  hd 0, hnr, hd 0]
 
-scoMaracas = mp' $ line [dhnr, tri $ line [ed 0.5, ed 0, ed 0]]
+scoMaracas = mp' $ line [dhnr, trn $ line [ed 0.5, ed 0, ed 0]]
 
 drums = loop 8 $ chord [
         bassDrum1 scoTom,
@@ -25,7 +25,7 @@
     mf' $ high $ sustain 0.5 $ chord [
         p' $ loop 2 $ qn $ line [f, c, e, f, c, e, f, c],
         accent 1 $ low $ line [dwn a, dwn gs, hnr],
-        accent 1.5 $ line [bnr, hnr, tri $ line [dhn gs, dhn e, dhn d]]
+        accent 1.5 $ line [bnr, hnr, trn $ line [dhn gs, dhn e, dhn d]]
     ]
 
 accomp = loop 4 $ glockenspiel scoAccomp 
diff --git a/examples/readme.hs b/examples/readme.hs
--- a/examples/readme.hs
+++ b/examples/readme.hs
@@ -3,10 +3,13 @@
 'temporal-music-notation-demo' examples.
 
 
-Examples rely on one external package 'temporal-music-notation-western'.
+Examples depend on an external package 'temporal-music-notation-western'.
 This package contains names specific to western music tradition.
 So to run them do first.
 
 >>cabal update
 >>cabal install temporal-music-notation-western
+
+A tune is first rendered to midi-file and then file is played back with the program timidity.
+Timidity is recommended for this library, because timidity can interpret microtonal midi-messages.
 -}
diff --git a/src/Temporal/Music/Demo.hs b/src/Temporal/Music/Demo.hs
--- a/src/Temporal/Music/Demo.hs
+++ b/src/Temporal/Music/Demo.hs
@@ -5,7 +5,7 @@
     module Temporal.Music,
     MidiNote,
     -- * Instruments
-    instr, drumInstr,
+    Instr, instr, drumInstr,
     -- * Rendering
     renderMidi, FilePath, exportMidi) 
 where
diff --git a/temporal-music-notation-demo.cabal b/temporal-music-notation-demo.cabal
--- a/temporal-music-notation-demo.cabal
+++ b/temporal-music-notation-demo.cabal
@@ -1,5 +1,5 @@
 Name:          temporal-music-notation-demo
-Version:       0.2.1
+Version:       0.2.3
 Cabal-Version: >= 1.6
 License:       BSD3
 License-file:  LICENSE
@@ -25,19 +25,19 @@
                examples/break.hs
                examples/readme.hs
 
+Homepage:        https://github.com/anton-k/temporal-music-notation-demo
+Bug-Reports:     https://github.com/anton-k/temporal-music-notation-demo/issues
 
-               
 Source-repository head
-  Type:     git
-  Location: https://github.com/anton-k/temporal-music-notation-demo
-
+    Type: git
+    Location: https://github.com/anton-k/temporal-music-notation-demo
 
 Library
   Build-Depends:
         base >= 4, base < 5,
         data-default >= 0.3,
-        temporal-music-notation >= 0.2,
-        HCodecs >= 0.2, binary >= 0.5.0.2
+        temporal-music-notation >= 0.2.3,
+        HCodecs >= 0.2, binary >= 0.6
   Hs-Source-Dirs:      src/
   Exposed-Modules:
         Temporal.Music.Demo