--- alexandria-0.6.8/lib/alexandria/ui/dialogs/acquire_dialog.rb.nogst	2011-11-16 02:37:09.000000000 +0900

+++ alexandria-0.6.8/lib/alexandria/ui/dialogs/acquire_dialog.rb	2011-12-25 02:22:12.000000000 +0900

@@ -20,7 +20,18 @@

 require 'alexandria/scanners/cuecat'

 require 'alexandria/scanners/keyboard'

-require 'alexandria/ui/sound'

+support_sound = true

+begin

+  require 'gst'

+rescue LoadError => e

+  Alexandria::log.warn { e.message }

+  Alexandria::log.warn { "Sound support is disabled" }

+  support_sound = false

+end

+

+if support_sound

+  require 'alexandria/ui/sound'

+end

 require 'alexandria/ui/dialogs/barcode_animation'

 module Alexandria

@@ -556,6 +567,7 @@

           end

         end

+        return unless support_sound

         # @sound_player = SoundEffectsPlayer.new

         @sound_players = {}

         @sound_players["scanning"] = SoundEffectsPlayer.new

@@ -565,6 +577,7 @@

       end

       def play_sound(effect)

+        return unless support_sound

         # HACK, do some thread waiting, if possible

         puts "scanning sound : #{@prefs.play_scanning_sound}"

         puts "scan sound:      #{ @prefs.play_scan_sound}"