diff --git a/src/gui.cxx b/src/gui.cxx
new file mode 100644
index 0000000..0f178cd
--- /dev/null
+++ b/src/gui.cxx
@@ -0,0 +1,19 @@
+
+
+#include "gui.hxx"
+
+Gui::Gui()
+{
+  window = new Fl_Window(340,180);
+  box = new Fl_Box(20,40,300,100,"Luppp 5");
+  box->box(FL_UP_BOX);
+  box->labelsize(36);
+  box->labeltype(FL_SHADOW_LABEL);
+  window->end();
+}
+
+int Gui::show()
+{
+  window->show();
+  return Fl::run();
+}
diff --git a/src/gui.hxx b/src/gui.hxx
new file mode 100644
index 0000000..e7d7ff0
--- /dev/null
+++ b/src/gui.hxx
@@ -0,0 +1,20 @@
+
+#ifndef LUPPP_GUI
+#define LUPPP_GUI
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Box.H>
+
+class Gui
+{
+  public:
+    Gui();
+    int show();
+  
+  private:
+    Fl_Window*  window;
+    Fl_Box*     box;
+};
+
+#endif // LUPPP_GUI
diff --git a/src/jack.cxx b/src/jack.cxx
index 9e6b89e..d7ca755 100644
--- a/src/jack.cxx
+++ b/src/jack.cxx
@@ -62,7 +62,7 @@ int Jack::process (jack_nframes_t nframes)
   
   for(uint i = 0; i < nframes; i++)
   {
-    *output = *input;
+    *output++ = *input++;
   }
   
   return false;
diff --git a/src/main.cxx b/src/main.cxx
index ec96445..84f1e0a 100644
--- a/src/main.cxx
+++ b/src/main.cxx
@@ -7,6 +7,7 @@
 #include <jack/ringbuffer.h>
 
 // Internal
+#include "gui.hxx"
 #include "jack.hxx"
 
 
@@ -25,7 +26,7 @@ int main()
   
   jack->activate();
   
-  sleep(10);
-  
+  Gui gui;
+  gui.show();
   
 }
diff --git a/wscript b/wscript
index 9121fa6..88b6d2f 100644
--- a/wscript
+++ b/wscript
@@ -12,15 +12,17 @@ def options(opt):
 def configure(conf):
   conf.load('compiler_cxx')
   conf.env.append_value('CXXFLAGS', ['-g', '-Wall']) #'-O2'
+  conf.check_cfg(package='ntk',at_least_version='1.3',args='--cflags --libs',uselib_store='NTK')
   conf.check_cfg(package='jack',at_least_version='0.118',args='--cflags --libs',uselib_store='JACK')
   #conf.check_cfg(package='lilv-0',at_least_version='1.0',args='--cflags --libs',uselib_store='LILV')
   #conf.check_cfg(package='sndfile',at_least_version='1.0',args='--cflags --libs',uselib_store='SNDFILE')
 
 def build(bld):
   
-  sources = ['src/main.cxx',
+  sources = ['src/gui.cxx',
+             'src/main.cxx',
              'src/jack.cxx',
              'src/eventhandlerdsp.cxx']
   
-  bld.program(source = sources, target='luppp5', use='JACK')
+  bld.program(source = sources, target='luppp5', use='JACK NTK')