diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..4fe900c
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,42 @@
+project( 'openav_luppp', ['c','cpp'],
+  default_options : [
+    'cpp_std=c++11',
+    ])
+
+conf_data = configuration_data()
+conf_data.set('version', '1.1.1')
+
+
+if(get_option('tests') == true)
+  add_project_arguments('-DBUILD_TESTS', language : 'cpp')
+endif
+
+add_project_arguments('-Wno-unused-variable', language : 'cpp')
+add_project_arguments('-Wno-reorder', language : 'cpp')
+add_project_arguments('-Wno-sign-compare', language : 'cpp')
+
+cc  = meson.get_compiler('c')
+cpp = meson.get_compiler('cpp')
+
+luppp_src = []
+subdir('src')
+
+
+dep_names = [
+  'ntk',
+  'cairo',
+  'liblo',
+  'jack',
+  'sndfile',
+  'samplerate',
+  'x11'
+  ]
+deps = []
+
+foreach dep : dep_names
+  deps += dependency(dep)
+endforeach
+
+# compile the main project
+executable('luppp', luppp_src + [version_hxx],
+    dependencies: deps)
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..701b984
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1 @@
+option('tests', type : 'boolean', value : true, description : 'Build tests')
diff --git a/src/avtk/avtk_unit.h b/src/avtk/avtk_unit.h
index c2626c8..935c0fd 100644
--- a/src/avtk/avtk_unit.h
+++ b/src/avtk/avtk_unit.h
@@ -76,7 +76,7 @@ public:
 		clips[5].state = UnitState::UNIT_STOPPING;
 	}
 
-	static const int numClips = 10;
+	static const int numClips = NSCENES;
 	UnitState clips[numClips];
 
 	bool mouseOver;
diff --git a/src/avtk/clipselector.cxx b/src/avtk/clipselector.cxx
index c2f8fd9..07a3e5d 100644
--- a/src/avtk/clipselector.cxx
+++ b/src/avtk/clipselector.cxx
@@ -47,7 +47,7 @@ ClipSelector::ClipSelector( int _x, int _y, int _w, int _h,
 	_master = master;
 
 	if ( _master ) {
-		for(int i = 0; i < numClips; i++ ) {
+		for(int i = 0; i < NSCENES; i++ ) {
 			stringstream s;
 			s << "Scene " << i + 1;
 			clips[i].setName( s.str() );
diff --git a/src/avtk/clipselector.hxx b/src/avtk/clipselector.hxx
index 2902905..c4228e0 100644
--- a/src/avtk/clipselector.hxx
+++ b/src/avtk/clipselector.hxx
@@ -97,8 +97,7 @@ public:
 
 	int ID;
 
-	// FIXME: NSCENES?
-	static const int numClips = 11;
+	static const int numClips = NSCENES;
 	ClipState clips[numClips];
 
 	/// indicates if a clip is the "special" clip
diff --git a/src/avtk/meson.build b/src/avtk/meson.build
new file mode 100644
index 0000000..66860a8
--- /dev/null
+++ b/src/avtk/meson.build
@@ -0,0 +1 @@
+luppp_src += files( 'bindings.cxx', 'volume.cxx', 'clipselector.cxx')
diff --git a/src/cjson/meson.build b/src/cjson/meson.build
new file mode 100644
index 0000000..3d44a70
--- /dev/null
+++ b/src/cjson/meson.build
@@ -0,0 +1 @@
+luppp_src += files('cJSON.c')
diff --git a/src/config.hxx b/src/config.hxx
index bc035ab..b238204 100644
--- a/src/config.hxx
+++ b/src/config.hxx
@@ -51,6 +51,10 @@
 #define NSCENES 10
 #define MAX_BUFFER_SIZE 1024
 
+///     TEMPO
+#define MIN_TEMPO 60
+#define MAX_TEMPO 220
+
 #define CONTROLLERS_PREALLOC 20
 
 // nsamples remaining during recording before Looper requests larger buffer
diff --git a/src/controller/genericmidi.cxx b/src/controller/genericmidi.cxx
index b729678..78ca8b3 100644
--- a/src/controller/genericmidi.cxx
+++ b/src/controller/genericmidi.cxx
@@ -547,7 +547,7 @@ void GenericMIDI::midi(unsigned char* midi)
 				break;
 			case Event::TIME_BPM:
 				// FIXME: quick-fix for "ZeroOne" type value -> BPM range
-				jack->getLogic()->setBpm( value * 160 + 60 );
+				jack->getLogic()->setBpm( value * (MAX_TEMPO - MIN_TEMPO) + MIN_TEMPO );
 				break;
 			case Event::METRONOME_ACTIVE:
 				jack->getLogic()->metronomeEnable( b->active );
diff --git a/src/controller/meson.build b/src/controller/meson.build
new file mode 100644
index 0000000..f240e87
--- /dev/null
+++ b/src/controller/meson.build
@@ -0,0 +1,6 @@
+luppp_src += files(
+  'controller.cxx',
+  'genericmidi.cxx',
+  'guicontroller.cxx',
+  'nonseq.cxx'
+)
diff --git a/src/dsp/meson.build b/src/dsp/meson.build
new file mode 100644
index 0000000..c84e1a3
--- /dev/null
+++ b/src/dsp/meson.build
@@ -0,0 +1 @@
+luppp_src += files('dsp_sidechain_gain.cxx')
diff --git a/src/gmastertrack.cxx b/src/gmastertrack.cxx
index e61f3dd..a25106a 100644
--- a/src/gmastertrack.cxx
+++ b/src/gmastertrack.cxx
@@ -23,7 +23,7 @@
 static void gmastertrack_tempoDial_callback(Fl_Widget *w, void *data)
 {
 	Avtk::Dial* b = (Avtk::Dial*)w;
-	float bpm = (int)(b->value() * 160.f + 60);
+	float bpm = (int)(b->value() * (float)(MAX_TEMPO - MIN_TEMPO) + MIN_TEMPO);
 	if(std::fabs(bpm-round(bpm))) {
 		LUPPP_WARN("%f",bpm);
 	}
@@ -169,8 +169,20 @@ static void gmastertrack_button_callback(Fl_Widget *w, void *data)
 
 
 	} else if ( strcmp( w->label(), "Tap" ) == 0 ) {
-		EventTimeTempoTap e;
-		writeToDspRingbuffer( &e );
+		if ( Fl::event_button() == FL_RIGHT_MOUSE ) {
+			const char* answer = fl_input("Enter BPM value (range %d and %d):", 0, MIN_TEMPO, MAX_TEMPO);
+			if(answer) {
+				int bpm = atoi(answer);
+				
+				if ( bpm >= MIN_TEMPO && bpm <= MAX_TEMPO) {
+					EventTimeBPM e = EventTimeBPM( bpm );
+					writeToDspRingbuffer( &e );
+				}
+			}
+		} else {
+			EventTimeTempoTap e;
+			writeToDspRingbuffer( &e );
+		}
 	} else {
 		LUPPP_WARN("Error: unknown command string");
 	}
@@ -260,7 +272,7 @@ GMasterTrack::GMasterTrack(int x, int y, int w, int h, const char* l ) :
 void GMasterTrack::setBpm( int b )
 {
 	bpm = b;
-	tempoDial.value( ( bpm - 60 ) / 160.f );
+	tempoDial.value( ( bpm - MIN_TEMPO ) / (float)(MAX_TEMPO - MIN_TEMPO) );
 	std::stringstream s;
 	s << bpm;
 	tempoDial.copy_label( s.str().c_str() );
diff --git a/src/gui.cxx b/src/gui.cxx
index 3aaf3cd..f1e692e 100644
--- a/src/gui.cxx
+++ b/src/gui.cxx
@@ -880,7 +880,17 @@ int Gui::keyboardHandler(int event)
 		}
 	}
 
-	// keyboard arrows to special key mapping
+	// keyboard arrows / space to special key mapping
+	if ( Fl::event_key( 32 ) &&  Fl::event_state( FL_SHIFT ) ) { //spacebar + shift
+		EventGridState e( gui->specialTrack, gui->specialScene, GridLogic::STATE_EMPTY  );
+		writeToDspRingbuffer( &e );
+		return 1;
+	}
+	if ( Fl::event_key( 32 ) ) { //spacebar
+		EventGridEvent e( gui->specialTrack, gui->specialScene, true );
+		writeToDspRingbuffer( &e );
+		return 1;
+	}
 	if ( Fl::event_key( FL_Left  ) ) {
 		EventGridSelectNewChosen e( gui->specialTrack-1, gui->specialScene  );
 		writeToDspRingbuffer( &e );
diff --git a/src/jacksendreturn.cxx b/src/jacksendreturn.cxx
index 6b87e99..d803f4c 100644
--- a/src/jacksendreturn.cxx
+++ b/src/jacksendreturn.cxx
@@ -36,10 +36,12 @@ void JackSendReturn::process(unsigned int nframes, Buffers *buffers)
 
 	//Process previous AudioProcessor
 	m_previousProcessor->process(nframes,buffers);
-	float* sendL=(float*)jack_port_get_buffer(m_sendport_l,(jack_nframes_t)(buffers->nframes));
-	float* sendR=(float*)jack_port_get_buffer(m_sendport_r,(jack_nframes_t)(buffers->nframes));
-	float* retL=(float*)jack_port_get_buffer(m_returnport_l,(jack_nframes_t)(buffers->nframes));
-	float* retR=(float*)jack_port_get_buffer(m_returnport_r,(jack_nframes_t)(buffers->nframes));
+
+	float* sendL=(float*)jack_port_get_buffer(m_sendport_l,  (jack_nframes_t)(buffers->nframes));
+	float* sendR=(float*)jack_port_get_buffer(m_sendport_r,  (jack_nframes_t)(buffers->nframes));
+	float* retL =(float*)jack_port_get_buffer(m_returnport_l,(jack_nframes_t)(buffers->nframes));
+	float* retR =(float*)jack_port_get_buffer(m_returnport_r,(jack_nframes_t)(buffers->nframes));
+
 	if(offset) {
 		sendL+=offset;
 		sendR+=offset;
@@ -50,11 +52,7 @@ void JackSendReturn::process(unsigned int nframes, Buffers *buffers)
 	for(int i=0; i<nframes; i++) {
 		sendL[i]=m_sendvol*sendtrackL[i];
 		sendR[i]=m_sendvol*sendtrackR[i];
-    }
-//    if(nframes!=buffers->nframes)
-//    {
-//        cout<<send<<endl;
-//    }
+	}
 
 	if(offset)
 		assert(offset+nframes==buffers->nframes);
@@ -62,13 +60,11 @@ void JackSendReturn::process(unsigned int nframes, Buffers *buffers)
 	if(m_active) {
 		memcpy(rettrackL,retL,nframes*sizeof(float));
 		memcpy(rettrackR,retR,nframes*sizeof(float));
-    }
+	}
 	else {
-		memcpy(rettrackL,
-		       sendtrackL,nframes*sizeof(float));
-		memcpy(rettrackR,
-		       sendtrackR,nframes*sizeof(float));
-    }
+		memcpy(rettrackL, sendtrackL,nframes*sizeof(float));
+		memcpy(rettrackR, sendtrackR,nframes*sizeof(float));
+	}
 	m_counter+=nframes;
 
 }
diff --git a/src/looper.cxx b/src/looper.cxx
index 13cda8b..92fb8aa 100644
--- a/src/looper.cxx
+++ b/src/looper.cxx
@@ -42,7 +42,7 @@ Looper::Looper(int t) :
 	//tmpRecordBuffer = (float*)malloc( sizeof(float) * MAX_BUFFER_SIZE );
 	//memset( tmpRecordBuffer, 0, sizeof(float) * MAX_BUFFER_SIZE );
 
-	for(int i = 0; i < 10; i++ ) {
+	for(int i = 0; i < NSCENES; i++ ) {
 		clips[i] = new LooperClip(track, i);
 	}
 
@@ -150,7 +150,7 @@ void Looper::process(unsigned int nframes, Buffers* buffers)
 				// write the pitch-shifted signal to the track buffer
 				//FIXME: pitchShift adds delay even for playSpeed = 1.0!!
 				//we should use something better (e.g librubberband)
-				if(playSpeed!=1.0f) {
+				if(0) { //playSpeed!=1.0f) {
 					pitchShift( 1, &tmpL, &outL[i] );
 					pitchShift( 1, &tmpR, &outR[i] );
 				} else {
diff --git a/src/looper.hxx b/src/looper.hxx
index 5bc3720..2f37814 100644
--- a/src/looper.hxx
+++ b/src/looper.hxx
@@ -70,7 +70,7 @@ private:
 	int fpb;
 
 	//vector<float> tmpRecordBuffer;
-	LooperClip* clips[10];
+	LooperClip* clips[NSCENES];
 
 	// Pitch Shifting
 	void pitchShift(int count, float* input, float* output);
diff --git a/src/looperclip.cxx b/src/looperclip.cxx
index c6c8236..a852cf3 100644
--- a/src/looperclip.cxx
+++ b/src/looperclip.cxx
@@ -450,9 +450,9 @@ void LooperClip::getSample(float playSpeed, float* L, float* R)
 
 		std::vector<float>& vL = _buffer->getDataL();
 		std::vector<float>& vR = _buffer->getDataR();
-		*L = vL.at(_playhead);
-		*R = vR.at(_playhead);
-		_playhead +=playSpeed;
+		*L = vL[_playhead];
+		*R = vR[_playhead];
+		_playhead += playSpeed;
 	} else {
 		*L = 0.f;
 		*R = 0.f;
diff --git a/src/meson.build b/src/meson.build
new file mode 100644
index 0000000..d350343
--- /dev/null
+++ b/src/meson.build
@@ -0,0 +1,40 @@
+version_hxx = vcs_tag(
+    input  : 'version.hxx.in',
+    output : 'version.hxx')
+
+luppp_src = files(
+  'audiobuffer.cxx',
+  'controllerupdater.cxx',
+  'debug.cxx',
+  'diskreader.cxx',
+  'diskwriter.cxx',
+  'event.cxx',
+  'eventhandlerdsp.cxx',
+  'eventhandlergui.cxx',
+  'gaudioeditor.cxx',
+  'gmastertrack.cxx',
+  'goptions.cxx',
+  'gridlogic.cxx',
+  'gtrack.cxx',
+  'gui.cxx',
+  'jack.cxx',
+  'jacksendreturn.cxx',
+  'logic.cxx',
+  'looperclip.cxx',
+  'looper.cxx',
+  'main.cxx',
+  'metronome.cxx',
+  'timemanager.cxx',
+  'trackoutput.cxx'
+  )
+
+subdir('cjson')
+subdir('dsp')
+subdir('controller')
+subdir('observer')
+subdir('state')
+subdir('avtk')
+
+if(get_option('tests') == true)
+  subdir('tests')
+endif
diff --git a/src/observer/meson.build b/src/observer/meson.build
new file mode 100644
index 0000000..8016da9
--- /dev/null
+++ b/src/observer/meson.build
@@ -0,0 +1 @@
+luppp_src += files('midi.cxx', 'time.cxx')
diff --git a/src/state/meson.build b/src/state/meson.build
new file mode 100644
index 0000000..236ada8
--- /dev/null
+++ b/src/state/meson.build
@@ -0,0 +1 @@
+luppp_src += files('state.cxx', 'stately.cxx')
diff --git a/src/tests/meson.build b/src/tests/meson.build
new file mode 100644
index 0000000..2a5604d
--- /dev/null
+++ b/src/tests/meson.build
@@ -0,0 +1,5 @@
+luppp_src += files(
+  'diskreadertest.cxx',
+  'diskwritertest.cxx',
+  'goptionstest.cxx',
+  'gridlogictests.cxx')
diff --git a/src/timemanager.cxx b/src/timemanager.cxx
index 1a262d3..60bc9b2 100644
--- a/src/timemanager.cxx
+++ b/src/timemanager.cxx
@@ -82,7 +82,7 @@ void TimeManager::setBpm(float bpm)
 
 void TimeManager::setBpmZeroOne(float b)
 {
-	setBpm( b * 160 + 60 ); // 60 - 220
+	setBpm( b * (MAX_TEMPO - MIN_TEMPO) + MIN_TEMPO ); // 60 - 220
 }
 
 
diff --git a/src/version.hxx.in b/src/version.hxx.in
new file mode 100644
index 0000000..9f82d90
--- /dev/null
+++ b/src/version.hxx.in
@@ -0,0 +1 @@
+#define GIT_VERSION "@VCS_TAG@"