diff --git a/daemon/src/audio/alsa/alsalayer.cpp b/daemon/src/audio/alsa/alsalayer.cpp
index 3a7550e0adeebc4f88695f77284df981adef2f0a..7f310dd39cc134d167a25270fc32754506ab8743 100644
--- a/daemon/src/audio/alsa/alsalayer.cpp
+++ b/daemon/src/audio/alsa/alsalayer.cpp
@@ -92,11 +92,11 @@ AlsaLayer::AlsaLayer (ManagerImpl* manager)
 
 {
     _debug ("Audio: Build ALSA layer");
-    _urgentRingBuffer.createReadPointer();
+    urgentRingBuffer_.createReadPointer();
 
-    audioPlugin_ = AudioLayer::_manager->audioPreference.getPlugin();
+    audioPlugin_ = manager_->audioPreference.getPlugin();
 
-    AudioLayer::_noisesuppressstate = true;
+    noiseSuppressState_ = true;
 }
 
 // Destructor
@@ -146,26 +146,26 @@ AlsaLayer::openDevice (int indexIn, int indexOut, int indexRing, int sampleRate,
     else if ( (stream == SFL_PCM_PLAYBACK or stream == SFL_PCM_BOTH) and is_playback_open_)
         closePlaybackStream ();
 
-    _indexIn = indexIn;
-    _indexOut = indexOut;
-    _indexRing = indexRing;
+    indexIn_ = indexIn;
+    indexOut_ = indexOut;
+    indexRing_ = indexRing;
 
-    _audioSampleRate = sampleRate;
-    _frameSize = frameSize;
+    audioSampleRate_ = sampleRate;
+    frameSize_ = frameSize;
 
     audioPlugin_ = plugin;
 
-    _debugAlsa (" Setting AlsaLayer: device     in=%2d, out=%2d, ring=%2d", _indexIn, _indexOut, _indexRing);
+    _debugAlsa (" Setting AlsaLayer: device     in=%2d, out=%2d, ring=%2d", indexIn_, indexOut_, indexRing_);
     _debugAlsa ("                   : alsa plugin=%s", audioPlugin_.c_str());
-    _debugAlsa ("                   : nb channel in=%2d, out=%2d", _inChannel, _outChannel);
-    _debugAlsa ("                   : sample rate=%5d, format=%s", _audioSampleRate, SFLDataFormatString);
+    _debugAlsa ("                   : nb channel in=%2d, out=%2d", inChannel_, outChannel_);
+    _debugAlsa ("                   : sample rate=%5d, format=%s", audioSampleRate_, SFLDataFormatString);
 
     audioThread_ = NULL;
 
     // use 1 sec buffer for resampling
-    converter_ = new SamplerateConverter (_audioSampleRate);
-    _dcblocker = new DcBlocker;
-    _audiofilter = new AudioProcessing (_dcblocker);
+    converter_ = new SamplerateConverter (audioSampleRate_);
+    dcblocker_ = new DcBlocker;
+    audiofilter_ = new AudioProcessing (dcblocker_);
 }
 
 void
@@ -173,8 +173,8 @@ AlsaLayer::startStream (void)
 {
     _debug ("Audio: Start stream");
 
-    if (_audiofilter)
-        _audiofilter->resetAlgorithm();
+    if (audiofilter_)
+        audiofilter_->resetAlgorithm();
 
     if (is_playback_running_ and is_capture_running_)
         return;
@@ -184,18 +184,18 @@ AlsaLayer::startStream (void)
     std::string pcmc;
 
     if (audioPlugin_ == PCM_DMIX_DSNOOP) {
-        pcmp = buildDeviceTopo (PCM_DMIX, _indexOut, 0);
-        pcmr = buildDeviceTopo (PCM_DMIX, _indexRing, 0);
-        pcmc = buildDeviceTopo (PCM_DSNOOP, _indexIn, 0);
+        pcmp = buildDeviceTopo (PCM_DMIX, indexOut_, 0);
+        pcmr = buildDeviceTopo (PCM_DMIX, indexRing_, 0);
+        pcmc = buildDeviceTopo (PCM_DSNOOP, indexIn_, 0);
     } else {
-        pcmp = buildDeviceTopo (audioPlugin_, _indexOut, 0);
-        pcmr = buildDeviceTopo (audioPlugin_, _indexRing, 0);
-        pcmc = buildDeviceTopo (audioPlugin_, _indexIn, 0);
+        pcmp = buildDeviceTopo (audioPlugin_, indexOut_, 0);
+        pcmr = buildDeviceTopo (audioPlugin_, indexRing_, 0);
+        pcmc = buildDeviceTopo (audioPlugin_, indexIn_, 0);
     }
 
-    _debug ("pcmp: %s, index %d", pcmp.c_str(), _indexOut);
-    _debug ("pcmr: %s, index %d", pcmr.c_str(), _indexRing);
-    _debug ("pcmc: %s, index %d", pcmc.c_str(), _indexIn);
+    _debug ("pcmp: %s, index %d", pcmp.c_str(), indexOut_);
+    _debug ("pcmr: %s, index %d", pcmr.c_str(), indexRing_);
+    _debug ("pcmc: %s, index %d", pcmc.c_str(), indexIn_);
 
     if (not is_capture_open_)
         open_device (pcmp, pcmc, pcmr, SFL_PCM_CAPTURE);
@@ -222,7 +222,7 @@ AlsaLayer::startStream (void)
         }
     }
 
-    _isStarted = true;
+    isStarted_ = true;
 }
 
 void
@@ -230,7 +230,7 @@ AlsaLayer::stopStream (void)
 {
     _debug ("Audio: Stop stream");
 
-    _isStarted = false;
+    isStarted_ = false;
 
     try {
         /* Stop the audio thread first */
@@ -256,12 +256,6 @@ AlsaLayer::stopStream (void)
     flushMain ();
 }
 
-void AlsaLayer::setNoiseSuppressState (bool state)
-{
-    // if a stream already opened
-    AudioLayer::_noisesuppressstate = state;
-}
-
 //////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////   ALSA PRIVATE FUNCTIONS   ////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////////////////
@@ -430,17 +424,17 @@ bool AlsaLayer::alsa_set_params (snd_pcm_t *pcm_handle, int type)
     /* Set sample rate. If we can't set to the desired exact value, we set to the nearest acceptable */
     int dir = 0;
 
-    unsigned int exact_ivalue = _audioSampleRate;
+    unsigned int exact_ivalue = audioSampleRate_;
 
     if ((err = snd_pcm_hw_params_set_rate_near (pcm_handle, hwparams, &exact_ivalue, &dir) < 0)) {
         _debugAlsa ("Audio: Error: Cannot set sample rate (%s)", snd_strerror (err));
         return false;
     } else
-        _debug ("Audio: Set audio rate to %d", _audioSampleRate);
+        _debug ("Audio: Set audio rate to %d", audioSampleRate_);
 
     if (dir != 0) {
-        _debugAlsa ("Audio: Error: (%i) The chosen rate %d Hz is not supported by your hardware.Using %d Hz instead. ", type , _audioSampleRate, exact_ivalue);
-        _audioSampleRate = exact_ivalue;
+        _debugAlsa ("Audio: Error: (%i) The chosen rate %d Hz is not supported by your hardware.Using %d Hz instead. ", type , audioSampleRate_, exact_ivalue);
+        audioSampleRate_ = exact_ivalue;
     }
 
     /* Set the number of channels */
@@ -808,19 +802,19 @@ namespace
 
 void AlsaLayer::audioCallback (void)
 {
-    unsigned int _mainBufferSampleRate = getMainBuffer()->getInternalSamplingRate();
-    bool resample = _audioSampleRate != _mainBufferSampleRate;
+    unsigned int mainBufferSampleRate = getMainBuffer()->getInternalSamplingRate();
+    bool resample = audioSampleRate_ != mainBufferSampleRate;
 
     notifyincomingCall();
 
-    unsigned short spkrVolume = _manager->getSpkrVolume();
+    unsigned short spkrVolume = manager_->getSpkrVolume();
 
-    AudioLoop *tone = _manager->getTelephoneTone();
-    AudioLoop *file_tone = _manager->getTelephoneFile();
+    AudioLoop *tone = manager_->getTelephoneTone();
+    AudioLoop *file_tone = manager_->getTelephoneFile();
 
     // AvailForGet tell the number of chars inside the buffer
     // framePerBuffer are the number of data for one channel (left)
-    int urgentAvailBytes = _urgentRingBuffer.AvailForGet();
+    int urgentAvailBytes = urgentRingBuffer_.AvailForGet();
 
     if (!playbackHandle_ or !captureHandle_)
         return;
@@ -836,7 +830,7 @@ void AlsaLayer::audioCallback (void)
         if (toGet > playbackAvailBytes)
 			toGet = playbackAvailBytes;
         SFLDataFormat *out = (SFLDataFormat*) malloc (toGet);
-		_urgentRingBuffer.Get (out, toGet);
+		urgentRingBuffer_.Get (out, toGet);
         adjustVolume(out, toGet / sizeof(SFLDataFormat), spkrVolume);
 
 		write (out, toGet, playbackHandle_);
@@ -867,7 +861,7 @@ void AlsaLayer::audioCallback (void)
             // Compute maximal value to get from the ring buffer
             double resampleFactor = 1.0;
             if (resample) {
-                resampleFactor = (double) _audioSampleRate / _mainBufferSampleRate;
+                resampleFactor = (double) audioSampleRate_ / mainBufferSampleRate;
                 maxNbBytesToGet = (double) toGet / resampleFactor;
             }
 
@@ -882,7 +876,7 @@ void AlsaLayer::audioCallback (void)
 				int inSamples = toGet / sizeof(SFLDataFormat);
 				int outSamples = inSamples * resampleFactor;
 				SFLDataFormat *rsmpl_out = (SFLDataFormat*) malloc (outSamples * sizeof(SFLDataFormat));
-				converter_->resample (out, rsmpl_out, _mainBufferSampleRate, _audioSampleRate, inSamples);
+				converter_->resample (out, rsmpl_out, mainBufferSampleRate, audioSampleRate_, inSamples);
 				write (rsmpl_out, outSamples * sizeof(SFLDataFormat), playbackHandle_);
 				free (rsmpl_out);
 			} else {
@@ -932,19 +926,19 @@ void AlsaLayer::audioCallback (void)
     	free(in);
     	return;
     }
-    adjustVolume (in, toPutSamples, _manager->getSpkrVolume());
+    adjustVolume (in, toPutSamples, manager_->getSpkrVolume());
 
     if (resample) {
-    	int outSamples = toPutSamples * ((double) _audioSampleRate / _mainBufferSampleRate);
+    	int outSamples = toPutSamples * ((double) audioSampleRate_ / mainBufferSampleRate);
     	int outBytes = outSamples * sizeof (SFLDataFormat);
         SFLDataFormat* rsmpl_out = (SFLDataFormat*) malloc (outBytes);
-        converter_->resample ( (SFLDataFormat*) in, rsmpl_out, _mainBufferSampleRate, _audioSampleRate, toPutSamples);
-        _audiofilter->processAudio (rsmpl_out, outBytes);
+        converter_->resample ( (SFLDataFormat*) in, rsmpl_out, mainBufferSampleRate, audioSampleRate_, toPutSamples);
+        audiofilter_->processAudio (rsmpl_out, outBytes);
         getMainBuffer()->putData (rsmpl_out, outBytes);
         free (rsmpl_out);
     } else {
         SFLDataFormat* filter_out = (SFLDataFormat*) malloc (toPutBytes);
-		_audiofilter->processAudio (in, filter_out, toPutBytes);
+		audiofilter_->processAudio (in, filter_out, toPutBytes);
 		getMainBuffer()->putData (filter_out, toPutBytes);
 		free (filter_out);
     }
diff --git a/daemon/src/audio/alsa/alsalayer.h b/daemon/src/audio/alsa/alsalayer.h
index ff4f8ace624342b6730e6792204c5fdbae38a40a..46c5c92edbeefcabcb17ed572cb79a5c1f2adc50 100644
--- a/daemon/src/audio/alsa/alsalayer.h
+++ b/daemon/src/audio/alsa/alsalayer.h
@@ -144,19 +144,6 @@ class AlsaLayer : public AudioLayer
 
         void audioCallback (void);
 
-        /**
-         * Get the noise suppressor state
-         * @return true if noise suppressor activated
-         */
-        virtual bool getNoiseSuppressState (void) const {
-            return AudioLayer::_noisesuppressstate;
-        }
-
-        /**
-         * Set the noise suppressor state
-         * @param state true if noise suppressor active, false elsewhere
-         */
-        virtual void setNoiseSuppressState (bool state);
 
     private:
         void closeLayer (void);
diff --git a/daemon/src/audio/audiolayer.cpp b/daemon/src/audio/audiolayer.cpp
index 973f0272e13dc78783a83f19dda6e0feafcaee5c..dc19e57380e72e92ecba7d370ac492b6b9c4d6e2 100644
--- a/daemon/src/audio/audiolayer.cpp
+++ b/daemon/src/audio/audiolayer.cpp
@@ -36,66 +36,66 @@
 #include <cc++/numbers.h>
 
 AudioLayer::AudioLayer (ManagerImpl* manager , int type)
-    : _layerType (type)
-    , _isStarted(false)
-    , _manager (manager)
-    , _urgentRingBuffer (SIZEBUF, Call::DEFAULT_ID)
-    , _mainBuffer(0)
-    , _recorder(0)
-    , _indexIn (0)
-    , _indexOut (0)
-    , _indexRing(0)
-    , _audioSampleRate (0)
-    , _frameSize (0)
-    , _inChannel (1)
-    , _outChannel (1)
-    , _errorMessage (0)
-    , _mutex ()
-    , _dcblocker(0)
-    , _audiofilter(0)
-    , _noisesuppressstate(false)
-    , _countNotificationTime(0)
-      , _time (new ost::Time)
+    : layerType_ (type)
+    , isStarted_ (false)
+    , manager_ (manager)
+    , urgentRingBuffer_ (SIZEBUF, Call::DEFAULT_ID)
+    , mainBuffer_ (0)
+    , recorder_ (0)
+    , indexIn_ (0)
+    , indexOut_ (0)
+    , indexRing_ (0)
+    , audioSampleRate_ (0)
+    , frameSize_ (0)
+    , inChannel_ (1)
+    , outChannel_ (1)
+    , errorMessage_ (0)
+    , mutex_ ()
+    , dcblocker_ (0)
+    , audiofilter_ (0)
+    , noiseSuppressState_ (false)
+    , countNotificationTime_ (0)
+      , time_ (new ost::Time)
 {}
 
 
 AudioLayer::~AudioLayer ()
 {
-    delete _time;
-    delete _audiofilter;
-    delete _dcblocker;
+    delete time_;
+    delete audiofilter_;
+    delete dcblocker_;
 }
 
 void AudioLayer::flushMain (void)
 {
-    ost::MutexLock guard (_mutex);
+    ost::MutexLock guard (mutex_);
     // should pass call id
     getMainBuffer()->flushAllBuffers();
 }
 
 void AudioLayer::flushUrgent (void)
 {
-    ost::MutexLock guard (_mutex);
-    _urgentRingBuffer.flushAll();
+    ost::MutexLock guard (mutex_);
+    urgentRingBuffer_.flushAll();
 }
 
 void AudioLayer::putUrgent (void* buffer, int toCopy)
 {
-    ost::MutexLock guard (_mutex);
-    _urgentRingBuffer.Put (buffer, toCopy);
+    ost::MutexLock guard (mutex_);
+    urgentRingBuffer_.Put (buffer, toCopy);
 }
 
 void AudioLayer::notifyincomingCall()
 {
     // Notify (with a beep) an incoming call when there is already a call
     if (Manager::instance().incomingCallWaiting()) {
-        _countNotificationTime += _time->getSecond();
-        int countTimeModulo = _countNotificationTime % 5000;
+        countNotificationTime_ += time_->getSecond();
+        int countTimeModulo = countNotificationTime_ % 5000;
 
-        if ((countTimeModulo - _countNotificationTime) < 0)
+        if ((countTimeModulo - countNotificationTime_) < 0)
             Manager::instance().notificationIncomingCall();
 
-        _countNotificationTime = countTimeModulo;
+        countNotificationTime_ = countTimeModulo;
     }
 }
 
diff --git a/daemon/src/audio/audiolayer.h b/daemon/src/audio/audiolayer.h
index 0ba22e506243c5c48340a84bd5ec677d18785637..47a4fc70fa6d20543e9079360e48fbff982cf6d9 100644
--- a/daemon/src/audio/audiolayer.h
+++ b/daemon/src/audio/audiolayer.h
@@ -101,7 +101,7 @@ class AudioLayer
          */
         virtual void stopStream (void) = 0;
 
-        bool isStarted(void) { return _isStarted; }
+        bool isStarted(void) const { return isStarted_; }
 
         /**
          * Send a chunk of data to the hardware buffer to start the playback
@@ -121,8 +121,8 @@ class AudioLayer
          *		    Could be: ALSA_PLAYBACK_DEVICE
          *			      ALSA_CAPTURE_DEVICE
          */
-        void setErrorMessage (const int& error) {
-            _errorMessage = error;
+        void setErrorMessage (int error) {
+            errorMessage_ = error;
         }
 
         /**
@@ -130,7 +130,7 @@ class AudioLayer
          * @return int  The error code
          */
         int getErrorMessage() const {
-            return _errorMessage;
+            return errorMessage_;
         }
 
         /**
@@ -139,7 +139,7 @@ class AudioLayer
          *			0 for the first available card on the system, 1 ...
          */
         int getIndexIn() const {
-            return _indexIn;
+            return indexIn_;
         }
 
         /**
@@ -148,7 +148,7 @@ class AudioLayer
          *			0 for the first available card on the system, 1 ...
          */
         int getIndexOut() const {
-            return _indexOut;
+            return indexOut_;
         }
 
         /**
@@ -157,7 +157,7 @@ class AudioLayer
              *			0 for the first available card on the system, 1 ...
              */
         int getIndexRing() const {
-            return _indexRing;
+            return indexRing_;
         }
 
         /**
@@ -166,7 +166,7 @@ class AudioLayer
          *			    default: 44100 HZ
          */
         unsigned int getSampleRate() const {
-            return _audioSampleRate;
+            return audioSampleRate_;
         }
 
         /**
@@ -175,7 +175,7 @@ class AudioLayer
          *			    default: 20 ms
          */
         unsigned int getFrameSize() const {
-            return _frameSize;
+            return frameSize_;
         }
 
         /**
@@ -184,7 +184,7 @@ class AudioLayer
              *
              */
         int getLayerType (void) const {
-            return _layerType;
+            return layerType_;
         }
 
         /**
@@ -196,54 +196,56 @@ class AudioLayer
              * @return MainBuffer* a pointer to the MainBuffer instance
              */
         MainBuffer* getMainBuffer (void) const {
-            return _mainBuffer;
+            return mainBuffer_;
         }
 
         /**
          * Set the mainbuffer once the audiolayer is created
          */
         void setMainBuffer (MainBuffer* mainbuffer) {
-            _mainBuffer = mainbuffer;
+            mainBuffer_ = mainbuffer;
         }
 
         /**
          * Set the audio recorder
          */
         void setRecorderInstance (Recordable* rec) {
-            _recorder = rec;
+            recorder_ = rec;
         }
 
         /**
          * Get the audio recorder
          */
         Recordable* getRecorderInstance (void) const {
-            return _recorder;
+            return recorder_;
         }
 
-        /**
-         * Get the noise suppressor state
-         * @return true if noise suppressor activated
-         */
-        virtual bool getNoiseSuppressState (void) const = 0;
-
         /**
          * Set the noise suppressor state
          * @param state true if noise suppressor active, false elsewhere
          */
-        virtual void setNoiseSuppressState (bool state) = 0;
+        void setNoiseSuppressState (bool state) { noiseSuppressState_ = state; }
+        
+        /**
+         * Get the noise suppressor state
+         * @return true if noise suppressor activated
+         */
+        bool getNoiseSuppressState (void) const {
+            return noiseSuppressState_;
+        }
 
         /**
          * Get the mutex lock for the entire audio layer
          */
         ost::Mutex* getMutexLock (void) {
-            return &_mutex;
+            return &mutex_;
         }
 
         void notifyincomingCall (void);
 
     protected:
 
-        int _layerType;
+        int layerType_;
 
         /**
          * Drop the pending frames and close the capture device
@@ -258,15 +260,15 @@ class AudioLayer
         /**
 	 * Wether or not the audio layer stream is started
          */
-        bool _isStarted;
+        bool isStarted_;
 
         /** Augment coupling, reduce indirect access */
-        ManagerImpl* _manager;
+        ManagerImpl* manager_;
 
         /**
          * Urgent ring buffer used for ringtones
          */
-        RingBuffer _urgentRingBuffer;
+        RingBuffer urgentRingBuffer_;
 
         /**
          * Instance of the MainBuffer for the whole application
@@ -275,72 +277,72 @@ class AudioLayer
          * Audio instances must be registered into the MainBuffer and bound together via the ManagerImpl.
          *
          */
-        MainBuffer* _mainBuffer;
+        MainBuffer* mainBuffer_;
 
         /**
          * A pointer to the recordable instance (may be a call or a conference)
          */
-        Recordable* _recorder;
+        Recordable* recorder_;
 
         /**
          * Number of audio cards on which capture stream has been opened
          */
-        int _indexIn;
+        int indexIn_;
 
         /**
          * Number of audio cards on which playback stream has been opened
          */
-        int _indexOut;
+        int indexOut_;
 
         /**
          * Number of audio cards on which ringtone stream has been opened
          */
-        int _indexRing;
+        int indexRing_;
 
         /**
          * Sample Rate SFLphone should send sound data to the sound card
          * The value can be set in the user config file- now: 44100HZ
          */
-        unsigned int _audioSampleRate;
+        unsigned int audioSampleRate_;
 
         /**
          * Length of the sound frame we capture or read in ms
          * The value can be set in the user config file - now: 20ms
          */
-        unsigned int _frameSize;
+        unsigned int frameSize_;
 
         /**
          * Input channel (mic) should be 1 mono
          */
-        unsigned int _inChannel;
+        unsigned int inChannel_;
 
         /**
          * Output channel (stereo) should be 1 mono
          */
-        unsigned int _outChannel;
+        unsigned int outChannel_;
 
         /** Contains the current error code */
-        int _errorMessage;
+        int errorMessage_;
 
         /**
          * Lock for the entire audio layer
          */
-        ost::Mutex _mutex;
+        ost::Mutex mutex_;
 
-        DcBlocker *_dcblocker;
-        AudioProcessing *_audiofilter;
+        DcBlocker *dcblocker_;
+        AudioProcessing *audiofilter_;
 
-        bool _noisesuppressstate;
+        bool noiseSuppressState_;
 
         /**
          * Time counter used to trigger incoming call notification
          */
-        int _countNotificationTime;
+        int countNotificationTime_;
 
         /**
          * Used to get formated system time in order to compute incoming call notification
          */
-        ost::Time * _time;
+        ost::Time * time_;
 };
 
 #endif // _AUDIO_LAYER_H_
diff --git a/daemon/src/audio/pulseaudio/pulselayer.cpp b/daemon/src/audio/pulseaudio/pulselayer.cpp
index d46b0016bf55e9cab9911d67ea838845c2d91d92..da0d04fa451968cef82e4766db12cf09001e0551 100644
--- a/daemon/src/audio/pulseaudio/pulselayer.cpp
+++ b/daemon/src/audio/pulseaudio/pulselayer.cpp
@@ -227,9 +227,9 @@ PulseLayer::PulseLayer (ManagerImpl* manager)
     , ringtone_(0)
     , converter_(0)
 {
-    _urgentRingBuffer.createReadPointer();
+    urgentRingBuffer_.createReadPointer();
 
-    AudioLayer::_noisesuppressstate = true;
+    noiseSuppressState_ = true;
 
     openLayer();
 }
@@ -244,14 +244,14 @@ PulseLayer::~PulseLayer (void)
 void
 PulseLayer::openLayer (void)
 {
-	if(_isStarted)
+	if (isStarted_)
 		return;
 
 	_info ("Audio: Open Pulseaudio layer");
 
 	connectPulseAudioServer();
 
-	_isStarted = true;
+	isStarted_ = true;
 }
 
 void
@@ -259,7 +259,7 @@ PulseLayer::closeLayer (void)
 {
     _info ("Audio: Close Pulseaudio layer");
 
-    _isStarted = false;
+    isStarted_ = false;
 
     disconnectAudioStream();
 
@@ -375,19 +375,19 @@ void PulseLayer::context_state_callback (pa_context* c, void* user_data)
 
 void PulseLayer::openDevice (int indexIn UNUSED, int indexOut UNUSED, int indexRing UNUSED, int sampleRate, int frameSize , int stream UNUSED, const std::string &plugin UNUSED)
 {
-    _debug ("Audio: Open device sampling rate %d, frame size %d", _audioSampleRate, _frameSize);
+    _debug ("Audio: Open device sampling rate %d, frame size %d", audioSampleRate_, frameSize_);
 
-    _audioSampleRate = sampleRate;
-    _frameSize = frameSize;
+    audioSampleRate_ = sampleRate;
+    frameSize_ = frameSize;
 
     flushUrgent();
 
     // use 1 sec buffer for resampling
-    converter_ = new SamplerateConverter (_audioSampleRate);
+    converter_ = new SamplerateConverter (audioSampleRate_);
 
     // Instantiate the algorithm
-    AudioLayer::_dcblocker = new DcBlocker;
-    AudioLayer::_audiofilter = new AudioProcessing (_dcblocker);
+    dcblocker_ = new DcBlocker;
+    audiofilter_ = new AudioProcessing (dcblocker_);
 }
 
 
@@ -426,11 +426,11 @@ void PulseLayer::createStreams (pa_context* c)
 {
     _info ("Audio: Create streams");
 
-    playback_ = new AudioStream (c, mainloop_, PLAYBACK_STREAM_NAME, PLAYBACK_STREAM, _audioSampleRate);
+    playback_ = new AudioStream (c, mainloop_, PLAYBACK_STREAM_NAME, PLAYBACK_STREAM, audioSampleRate_);
 
-    std::string playbackDevice(_manager->audioPreference.getDevicePlayback());
-    std::string recordDevice(_manager->audioPreference.getDeviceRecord());
-    std::string ringtoneDevice(_manager->audioPreference.getDeviceRingtone());
+    std::string playbackDevice(manager_->audioPreference.getDevicePlayback());
+    std::string recordDevice(manager_->audioPreference.getDeviceRecord());
+    std::string ringtoneDevice(manager_->audioPreference.getDeviceRingtone());
 
     _debug ("Audio: Device for playback: %s", playbackDevice.c_str());
     _debug ("Audio: Device for record: %s", recordDevice.c_str());
@@ -447,7 +447,7 @@ void PulseLayer::createStreams (pa_context* c)
     pa_stream_set_moved_callback (playback_->pulseStream(), stream_moved_callback, this);
     pa_stream_set_latency_update_callback (playback_->pulseStream(), latency_update_callback, this);
 
-    record_ = new AudioStream (c, mainloop_, CAPTURE_STREAM_NAME, CAPTURE_STREAM, _audioSampleRate);
+    record_ = new AudioStream (c, mainloop_, CAPTURE_STREAM_NAME, CAPTURE_STREAM, audioSampleRate_);
 
     if (inSourceList (recordDevice))
         record_->connectStream (&recordDevice);
@@ -458,7 +458,7 @@ void PulseLayer::createStreams (pa_context* c)
     pa_stream_set_moved_callback (record_->pulseStream(), stream_moved_callback, this);
     pa_stream_set_latency_update_callback (record_->pulseStream(), latency_update_callback, this);
 
-    ringtone_ = new AudioStream (c, mainloop_, RINGTONE_STREAM_NAME, RINGTONE_STREAM, _audioSampleRate);
+    ringtone_ = new AudioStream (c, mainloop_, RINGTONE_STREAM_NAME, RINGTONE_STREAM, audioSampleRate_);
 
     if (inSourceList (ringtoneDevice))
         ringtone_->connectStream (&ringtoneDevice);
@@ -493,7 +493,7 @@ void PulseLayer::closeCaptureStream (void)
 
             if (name && strlen (name)) {
                 _debug ("Audio: record device to be stored in config: %s", name);
-                _manager->audioPreference.setDeviceRecord (name);
+                manager_->audioPreference.setDeviceRecord (name);
             }
         }
 
@@ -511,7 +511,7 @@ void PulseLayer::closePlaybackStream (void)
 
             if (name && strlen (name)) {
                 _debug ("Audio: playback device to be stored in config: %s", name);
-                _manager->audioPreference.setDevicePlayback (name);
+                manager_->audioPreference.setDevicePlayback (name);
             }
         }
 
@@ -525,7 +525,7 @@ void PulseLayer::closePlaybackStream (void)
 
             if (name && strlen (name)) {
                 _debug ("Audio: ringtone device to be stored in config: %s", name);
-                _manager->audioPreference.setDeviceRingtone (name);
+                manager_->audioPreference.setDeviceRingtone (name);
             }
         }
 
@@ -622,14 +622,6 @@ void PulseLayer::processData (void)
         readFromMic();
 }
 
-void PulseLayer::setNoiseSuppressState (bool state)
-{
-    // if a stream already opened
-    AudioLayer::_noisesuppressstate = state;
-
-}
-
-
 void PulseLayer::writeToSpeaker (void)
 {
     notifyincomingCall();
@@ -641,12 +633,12 @@ void PulseLayer::writeToSpeaker (void)
         return;
     }
 
-    int urgentBytes = _urgentRingBuffer.AvailForGet();
+    int urgentBytes = urgentRingBuffer_.AvailForGet();
     if (urgentBytes > writeableSizeBytes)
     	urgentBytes = writeableSizeBytes;
     if (urgentBytes) {
     	SFLDataFormat *out = (SFLDataFormat*) pa_xmalloc (urgentBytes);
-        _urgentRingBuffer.Get (out, urgentBytes);
+        urgentRingBuffer_.Get (out, urgentBytes);
         pa_stream_write (playback_->pulseStream(), out, urgentBytes, NULL, 0, PA_SEEK_RELATIVE);
         pa_xfree (out);
         // Consume the regular one as well (same amount of bytes)
@@ -654,7 +646,7 @@ void PulseLayer::writeToSpeaker (void)
         return;
     }
 
-    AudioLoop *toneToPlay = _manager->getTelephoneTone();
+    AudioLoop *toneToPlay = manager_->getTelephoneTone();
     if (toneToPlay) {
 		if (playback_->getStreamState() == PA_STREAM_READY) {
 			SFLDataFormat *out = (SFLDataFormat*) pa_xmalloc (writeableSizeBytes);
@@ -677,7 +669,7 @@ void PulseLayer::writeToSpeaker (void)
 	}
 
 	unsigned int mainBufferSampleRate = getMainBuffer()->getInternalSamplingRate();
-	bool resample = _audioSampleRate != mainBufferSampleRate;
+	bool resample = audioSampleRate_ != mainBufferSampleRate;
 
 	// how much samples we can write in the output
 	int outSamples = writeableSizeBytes / sizeof(SFLDataFormat);
@@ -687,7 +679,7 @@ void PulseLayer::writeToSpeaker (void)
 
 	double resampleFactor = 1.;
 	if (resample) {
-		resampleFactor = (double) _audioSampleRate / mainBufferSampleRate;
+		resampleFactor = (double) audioSampleRate_ / mainBufferSampleRate;
 		inSamples = (double) inSamples / resampleFactor;
 	}
 
@@ -702,7 +694,7 @@ void PulseLayer::writeToSpeaker (void)
 	// test if resampling is required
 	if (resample) {
 		SFLDataFormat* rsmpl_out = (SFLDataFormat*) pa_xmalloc (outBytes);
-		converter_->resample (out, rsmpl_out, mainBufferSampleRate, _audioSampleRate, inSamples);
+		converter_->resample (out, rsmpl_out, mainBufferSampleRate, audioSampleRate_, inSamples);
 		pa_stream_write (playback_->pulseStream(), rsmpl_out, outBytes, NULL, 0, PA_SEEK_RELATIVE);
 		pa_xfree (rsmpl_out);
 	} else
@@ -717,7 +709,7 @@ void PulseLayer::readFromMic (void)
     size_t r;
 
 	unsigned int mainBufferSampleRate = getMainBuffer()->getInternalSamplingRate();
-	bool resample = _audioSampleRate != mainBufferSampleRate;
+	bool resample = audioSampleRate_ != mainBufferSampleRate;
 
     if (pa_stream_peek (record_->pulseStream() , (const void**) &data , &r) < 0 or !data) {
         _error("Audio: Error capture stream peek failed: %s" , pa_strerror (pa_context_errno (context_)));
@@ -726,20 +718,20 @@ void PulseLayer::readFromMic (void)
 
 	if (resample) {
 		int inSamples = r / sizeof(SFLDataFormat);
-		double resampleFactor = (double) _audioSampleRate / mainBufferSampleRate;
+		double resampleFactor = (double) audioSampleRate_ / mainBufferSampleRate;
 		int outSamples = (double) inSamples * resampleFactor;
 		int outBytes = outSamples * sizeof(SFLDataFormat);
 
 		SFLDataFormat* rsmpl_out = (SFLDataFormat*) pa_xmalloc (outBytes);
-		converter_->resample ( (SFLDataFormat *) data, rsmpl_out, mainBufferSampleRate, _audioSampleRate, inSamples);
+		converter_->resample ( (SFLDataFormat *) data, rsmpl_out, mainBufferSampleRate, audioSampleRate_, inSamples);
 		// remove dc offset
-		_audiofilter->processAudio (rsmpl_out, outBytes);
+		audiofilter_->processAudio (rsmpl_out, outBytes);
 		getMainBuffer()->putData (rsmpl_out, outBytes);
 		pa_xfree (rsmpl_out);
 	} else {
 		SFLDataFormat* filter_out = (SFLDataFormat*) pa_xmalloc (r);
 		// remove dc offset
-		_audiofilter->processAudio ( (SFLDataFormat *) data, filter_out, r);
+		audiofilter_->processAudio ( (SFLDataFormat *) data, filter_out, r);
 		getMainBuffer()->putData (filter_out, r);
 		pa_xfree (filter_out);
 	}
@@ -752,7 +744,7 @@ end:
 
 void PulseLayer::ringtoneToSpeaker (void)
 {
-    AudioLoop* fileToPlay = _manager->getTelephoneFile();
+    AudioLoop* fileToPlay = manager_->getTelephoneFile();
     int writableSize = pa_stream_writable_size (ringtone_->pulseStream());
 
     if (fileToPlay) {
diff --git a/daemon/src/audio/pulseaudio/pulselayer.h b/daemon/src/audio/pulseaudio/pulselayer.h
index 05ed174a8ad31e5169419eba7f1417bbd9966709..353f1668667ebffa83f31b12dc2983ac7b8a2403 100644
--- a/daemon/src/audio/pulseaudio/pulselayer.h
+++ b/daemon/src/audio/pulseaudio/pulselayer.h
@@ -173,20 +173,6 @@ class PulseLayer : public AudioLayer
          */
         void processData (void);
 
-        /**
-         * Get the noise suppressor state
-         * @return true if noise suppressor activated
-         */
-        bool getNoiseSuppressState (void) const {
-            return AudioLayer::_noisesuppressstate;
-        }
-
-        /**
-         * Set the noise suppressor state
-         * @param state true if noise suppressor active, false elsewhere
-         */
-        void setNoiseSuppressState (bool state);
-
     private:
         // Copy Constructor
         PulseLayer (const PulseLayer& rh);