diff --git a/plugins/channel/udpsrc/udpsrc.cpp b/plugins/channel/udpsrc/udpsrc.cpp
index 14e8c60c5..b1bf3c012 100644
--- a/plugins/channel/udpsrc/udpsrc.cpp
+++ b/plugins/channel/udpsrc/udpsrc.cpp
@@ -24,11 +24,14 @@
 #include "udpsrcgui.h"
 
 MESSAGE_CLASS_DEFINITION(UDPSrc::MsgUDPSrcConfigure, Message)
+MESSAGE_CLASS_DEFINITION(UDPSrc::MsgUDPSrcConfigureImmediate, Message)
 MESSAGE_CLASS_DEFINITION(UDPSrc::MsgUDPSrcSpectrum, Message)
 
 UDPSrc::UDPSrc(MessageQueue* uiMessageQueue, UDPSrcGUI* udpSrcGUI, SampleSink* spectrum) :
 	m_settingsMutex(QMutex::Recursive),
-	m_audioFifo(4, 24000)
+	m_audioFifo(4, 24000),
+	m_audioActive(false),
+	m_volume(20)
 {
 	setObjectName("UDPSrc");
 
@@ -71,7 +74,7 @@ UDPSrc::UDPSrc(MessageQueue* uiMessageQueue, UDPSrcGUI* udpSrcGUI, SampleSink* s
 		qWarning("UDPSrc::UDPSrc: cannot bind audio port");
 	}
 
-	DSPEngine::instance()->addAudioSink(&m_audioFifo);
+	//DSPEngine::instance()->addAudioSink(&m_audioFifo);
 }
 
 UDPSrc::~UDPSrc()
@@ -79,12 +82,33 @@ UDPSrc::~UDPSrc()
 	delete m_audioSocket;
 	delete m_socket;
 	if (UDPFilter) delete UDPFilter;
-	DSPEngine::instance()->removeAudioSink(&m_audioFifo);
+	if (m_audioActive) DSPEngine::instance()->removeAudioSink(&m_audioFifo);
 }
 
-void UDPSrc::configure(MessageQueue* messageQueue, SampleFormat sampleFormat, Real outputSampleRate, Real rfBandwidth, QString& udpAddress, int udpPort, int boost)
+void UDPSrc::configure(MessageQueue* messageQueue,
+		SampleFormat sampleFormat,
+		Real outputSampleRate,
+		Real rfBandwidth,
+		QString& udpAddress,
+		int udpPort,
+		bool audioActive)
 {
-	Message* cmd = MsgUDPSrcConfigure::create(sampleFormat, outputSampleRate, rfBandwidth, udpAddress, udpPort, boost);
+	Message* cmd = MsgUDPSrcConfigure::create(sampleFormat,
+			outputSampleRate,
+			rfBandwidth,
+			udpAddress,
+			udpPort,
+			audioActive);
+	messageQueue->push(cmd);
+}
+
+void UDPSrc::configureImmediate(MessageQueue* messageQueue,
+		int boost,
+		int volume)
+{
+	Message* cmd = MsgUDPSrcConfigureImmediate::create(
+			boost,
+			volume);
 	messageQueue->push(cmd);
 }
 
@@ -217,6 +241,31 @@ bool UDPSrc::handleMessage(const Message& cmd)
 
 		return true;
 	}
+	else if (MsgUDPSrcConfigureImmediate::match(cmd))
+	{
+		MsgUDPSrcConfigureImmediate& cfg = (MsgUDPSrcConfigureImmediate&) cmd;
+
+		m_settingsMutex.lock();
+
+		if (cfg.getBoost() != m_boost)
+		{
+			m_boost = cfg.getBoost();
+		}
+
+		if (cfg.getVolume() != m_volume)
+		{
+			m_volume = cfg.getVolume();
+		}
+
+		m_settingsMutex.unlock();
+
+		qDebug() << "UDPSrc::handleMessage: MsgUDPSrcConfigureImmediate: "
+				<< " m_boost: " << m_boost
+				<< " m_volume: " << m_volume;
+
+		return true;
+
+	}
 	else if (MsgUDPSrcConfigure::match(cmd))
 	{
 		MsgUDPSrcConfigure& cfg = (MsgUDPSrcConfigure&) cmd;
@@ -242,7 +291,6 @@ bool UDPSrc::handleMessage(const Message& cmd)
 			}
 		}
 
-		m_boost = cfg.getBoost();
 		m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.0);
 		m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
 
@@ -255,6 +303,21 @@ bool UDPSrc::handleMessage(const Message& cmd)
 			UDPFilter->create_filter(0.0, m_rfBandwidth / 2.0 / m_outputSampleRate);
 		}
 
+		if (cfg.getAudioActive() != m_audioActive)
+		{
+			m_audioActive = cfg.getAudioActive();
+
+			if (m_audioActive)
+			{
+				m_audioBufferFill = 0;
+				DSPEngine::instance()->addAudioSink(&m_audioFifo);
+			}
+			else
+			{
+				DSPEngine::instance()->removeAudioSink(&m_audioFifo);
+			}
+		}
+
 		m_settingsMutex.unlock();
 
 		qDebug() << "UDPSrc::handleMessage: MsgUDPSrcConfigure: m_sampleFormat: " << m_sampleFormat
@@ -262,7 +325,8 @@ bool UDPSrc::handleMessage(const Message& cmd)
 				<< " m_rfBandwidth: " << m_rfBandwidth
 				<< " m_boost: " << m_boost
 				<< " m_udpAddress: " << cfg.getUDPAddress()
-				<< " m_udpPort: " << m_udpPort;
+				<< " m_udpPort: " << m_udpPort
+				<< " m+audioActive: " << m_audioActive;
 
 		return true;
 	}
@@ -299,33 +363,36 @@ void UDPSrc::audioReadyRead()
 		m_audioSocket->readDatagram(buffer.data(), buffer.size(), 0, 0);
 		//qDebug("UDPSrc::audioReadyRead: %d", buffer.size());
 
-		for (int i = 0; i < buffer.size() - 3; i += 4)
-	    {
-	    	qint16 l_sample = (qint16) *(&buffer.data()[i]);
-	    	qint16 r_sample = (qint16) *(&buffer.data()[i+2]);
-	    	m_audioBuffer[m_audioBufferFill].l  = l_sample * 100;
-	    	m_audioBuffer[m_audioBufferFill].r  = r_sample * 100;
-	    	++m_audioBufferFill;
-
-			if (m_audioBufferFill >= m_audioBuffer.size())
-			{
-				uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 1);
-
-				if (res != m_audioBufferFill)
-				{
-					qDebug("UDPSrc::audioReadyRead: lost %u samples", m_audioBufferFill - res);
-				}
-
-				m_audioBufferFill = 0;
-			}
-	    }
-
-		if (m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
+		if (m_audioActive)
 		{
-			qDebug("UDPSrc::audioReadyRead: lost samples");
-		}
+			for (int i = 0; i < buffer.size() - 3; i += 4)
+			{
+				qint16 l_sample = (qint16) *(&buffer.data()[i]);
+				qint16 r_sample = (qint16) *(&buffer.data()[i+2]);
+				m_audioBuffer[m_audioBufferFill].l  = l_sample * 10 * m_volume;
+				m_audioBuffer[m_audioBufferFill].r  = r_sample * 10 * m_volume;
+				++m_audioBufferFill;
 
-		m_audioBufferFill = 0;
+				if (m_audioBufferFill >= m_audioBuffer.size())
+				{
+					uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 1);
+
+					if (res != m_audioBufferFill)
+					{
+						qDebug("UDPSrc::audioReadyRead: lost %u samples", m_audioBufferFill - res);
+					}
+
+					m_audioBufferFill = 0;
+				}
+			}
+
+			if (m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
+			{
+				qDebug("UDPSrc::audioReadyRead: lost samples");
+			}
+
+			m_audioBufferFill = 0;
+		}
 	}
 
 	//qDebug("UDPSrc::audioReadyRead: done");
diff --git a/plugins/channel/udpsrc/udpsrc.h b/plugins/channel/udpsrc/udpsrc.h
index c50a7fb78..b170286a8 100644
--- a/plugins/channel/udpsrc/udpsrc.h
+++ b/plugins/channel/udpsrc/udpsrc.h
@@ -37,7 +37,16 @@ public:
 	UDPSrc(MessageQueue* uiMessageQueue, UDPSrcGUI* udpSrcGUI, SampleSink* spectrum);
 	virtual ~UDPSrc();
 
-	void configure(MessageQueue* messageQueue, SampleFormat sampleFormat, Real outputSampleRate, Real rfBandwidth, QString& udpAddress, int udpPort, int boost);
+	void configure(MessageQueue* messageQueue,
+			SampleFormat sampleFormat,
+			Real outputSampleRate,
+			Real rfBandwidth,
+			QString& udpAddress,
+			int udpPort,
+			bool audioActive);
+	void configureImmediate(MessageQueue* messageQueue,
+			int boost,
+			int volume);
 	void setSpectrum(MessageQueue* messageQueue, bool enabled);
 	Real getMagSq() const { return m_magsq; }
 
@@ -59,11 +68,22 @@ protected:
 		Real getRFBandwidth() const { return m_rfBandwidth; }
 		const QString& getUDPAddress() const { return m_udpAddress; }
 		int getUDPPort() const { return m_udpPort; }
-		int getBoost() const { return m_boost; }
+		bool getAudioActive() const { return m_audioActive; }
 
-		static MsgUDPSrcConfigure* create(SampleFormat sampleFormat, Real sampleRate, Real rfBandwidth, QString& udpAddress, int udpPort, int boost)
+		static MsgUDPSrcConfigure* create(SampleFormat
+				sampleFormat,
+				Real sampleRate,
+				Real rfBandwidth,
+				QString& udpAddress,
+				int udpPort,
+				bool audioActive)
 		{
-			return new MsgUDPSrcConfigure(sampleFormat, sampleRate, rfBandwidth, udpAddress, udpPort, boost);
+			return new MsgUDPSrcConfigure(sampleFormat,
+					sampleRate,
+					rfBandwidth,
+					udpAddress,
+					udpPort,
+					audioActive);
 		}
 
 	private:
@@ -72,18 +92,53 @@ protected:
 		Real m_rfBandwidth;
 		QString m_udpAddress;
 		int m_udpPort;
-		int m_boost;
+		bool m_audioActive;
 
-		MsgUDPSrcConfigure(SampleFormat sampleFormat, Real outputSampleRate, Real rfBandwidth, QString& udpAddress, int udpPort, int boost) :
+		MsgUDPSrcConfigure(SampleFormat sampleFormat,
+				Real outputSampleRate,
+				Real rfBandwidth,
+				QString& udpAddress,
+				int udpPort,
+				bool audioActive) :
 			Message(),
 			m_sampleFormat(sampleFormat),
 			m_outputSampleRate(outputSampleRate),
 			m_rfBandwidth(rfBandwidth),
 			m_udpAddress(udpAddress),
 			m_udpPort(udpPort),
-			m_boost(boost)
+			m_audioActive(audioActive)
 		{ }
 	};
+
+	class MsgUDPSrcConfigureImmediate : public Message {
+		MESSAGE_CLASS_DECLARATION
+
+	public:
+		int getBoost() const { return m_boost; }
+		int getVolume() const { return m_volume; }
+
+		static MsgUDPSrcConfigureImmediate* create(
+				int boost,
+				int volume)
+		{
+			return new MsgUDPSrcConfigureImmediate(
+					boost,
+					volume);
+		}
+
+	private:
+		int m_boost;
+		int m_volume;
+
+		MsgUDPSrcConfigureImmediate(
+				int boost,
+				int volume) :
+			Message(),
+			m_boost(boost),
+			m_volume(volume)
+		{ }
+	};
+
 	class MsgUDPSrcSpectrum : public Message {
 		MESSAGE_CLASS_DECLARATION
 
@@ -117,6 +172,8 @@ protected:
 	QHostAddress m_udpAddress;
 	quint16 m_udpPort;
 	int m_boost;
+	bool m_audioActive;
+	int m_volume;
 	Real m_magsq;
 
 	Real m_scale;
diff --git a/plugins/channel/udpsrc/udpsrcgui.cpp b/plugins/channel/udpsrc/udpsrcgui.cpp
index 2653f2429..b28d5dc86 100644
--- a/plugins/channel/udpsrc/udpsrcgui.cpp
+++ b/plugins/channel/udpsrc/udpsrcgui.cpp
@@ -55,8 +55,11 @@ void UDPSrcGUI::resetToDefaults()
 	ui->udpPort->setText("9999");
 	ui->spectrumGUI->resetToDefaults();
 	ui->boost->setValue(1);
+	ui->volume->setValue(20);
+	ui->audioActive->setChecked(false);
 
 	blockApplySettings(false);
+	applySettingsImmediate();
 	applySettings();
 }
 
@@ -73,6 +76,8 @@ QByteArray UDPSrcGUI::serialize() const
 	s.writeS32(8, (qint32)m_boost);
 	s.writeS32(9, m_channelMarker.getCenterFrequency());
 	s.writeString(10, m_udpAddress);
+	s.writeBool(11, m_audioActive);
+	s.writeS32(12, (qint32)m_volume);
 	return s.final();
 }
 
@@ -92,6 +97,7 @@ bool UDPSrcGUI::deserialize(const QByteArray& data)
 		QString strtmp;
 		qint32 s32tmp;
 		Real realtmp;
+		bool booltmp;
         
 		blockApplySettings(true);
 		m_channelMarker.blockSignals(true);
@@ -129,10 +135,15 @@ bool UDPSrcGUI::deserialize(const QByteArray& data)
 		m_channelMarker.setCenterFrequency(s32tmp);
 		d.readString(10, &strtmp, "127.0.0.1");
 		ui->udpAddress->setText(strtmp);
+		d.readBool(11, &booltmp, false);
+		ui->audioActive->setChecked(booltmp);
+		d.readS32(12, &s32tmp, 20);
+		ui->volume->setValue(s32tmp);
         
 		blockApplySettings(false);
 		m_channelMarker.blockSignals(false);
         
+		applySettingsImmediate();
 		applySettings();
 		return true;
 	}
@@ -169,7 +180,9 @@ UDPSrcGUI::UDPSrcGUI(PluginAPI* pluginAPI, QWidget* parent) :
 	m_channelMarker(this),
 	m_channelPowerDbAvg(40,0),
 	m_basicSettingsShown(false),
-	m_doApplySettings(true)
+	m_doApplySettings(true),
+	m_boost(1),
+	m_volume(20)
 {
 	ui->setupUi(this);
 	connect(this, SIGNAL(widgetRolled(QWidget*,bool)), this, SLOT(onWidgetRolled(QWidget*,bool)));
@@ -204,6 +217,7 @@ UDPSrcGUI::UDPSrcGUI(PluginAPI* pluginAPI, QWidget* parent) :
 
 	ui->spectrumGUI->setBuddies(m_spectrumVis->getInputMessageQueue(), m_spectrumVis, ui->glSpectrum);
 
+	applySettingsImmediate();
 	applySettings();
 }
 
@@ -224,6 +238,20 @@ void UDPSrcGUI::blockApplySettings(bool block)
     m_doApplySettings = !block;
 }
 
+void UDPSrcGUI::applySettingsImmediate()
+{
+	if (m_doApplySettings)
+	{
+		m_boost = ui->boost->value();
+		m_volume = ui->volume->value();
+
+		m_udpSrc->configureImmediate(m_udpSrc->getInputMessageQueue(),
+			m_boost,
+			m_volume);
+	}
+}
+
+
 void UDPSrcGUI::applySettings()
 {
 	if (m_doApplySettings)
@@ -253,6 +281,7 @@ void UDPSrcGUI::applySettings()
 		}
 
 		int boost = ui->boost->value();
+		bool audioActive = ui->audioActive->isChecked();
 
 		setTitleColor(m_channelMarker.getColor());
 		ui->deltaFrequency->setValue(abs(m_channelMarker.getCenterFrequency()));
@@ -294,6 +323,7 @@ void UDPSrcGUI::applySettings()
 		m_rfBandwidth = rfBandwidth;
 		m_udpPort = udpPort;
 		m_boost = boost;
+		m_audioActive = audioActive;
 
 		m_udpSrc->configure(m_udpSrc->getInputMessageQueue(),
 			sampleFormat,
@@ -301,7 +331,7 @@ void UDPSrcGUI::applySettings()
 			rfBandwidth,
 			m_udpAddress,
 			udpPort,
-			boost);
+			audioActive);
 
 		ui->applyBtn->setEnabled(false);
 	}
@@ -352,11 +382,23 @@ void UDPSrcGUI::on_applyBtn_clicked()
 	applySettings();
 }
 
+void UDPSrcGUI::on_audioActive_toggled(bool checked)
+{
+	ui->applyBtn->setEnabled(true);
+}
+
 void UDPSrcGUI::on_boost_valueChanged(int value)
 {
 	ui->boost->setValue(value);
 	ui->boostText->setText(QString("%1").arg(value));
-	ui->applyBtn->setEnabled(true);
+	applySettingsImmediate();
+}
+
+void UDPSrcGUI::on_volume_valueChanged(int value)
+{
+	ui->volume->setValue(value);
+	ui->volumeText->setText(QString("%1").arg(value));
+	applySettingsImmediate();
 }
 
 void UDPSrcGUI::onWidgetRolled(QWidget* widget, bool rollDown)
diff --git a/plugins/channel/udpsrc/udpsrcgui.h b/plugins/channel/udpsrc/udpsrcgui.h
index 0f9a1c586..87171a92e 100644
--- a/plugins/channel/udpsrc/udpsrcgui.h
+++ b/plugins/channel/udpsrc/udpsrcgui.h
@@ -46,10 +46,12 @@ private slots:
 	void on_rfBandwidth_textEdited(const QString& arg1);
 	void on_udpAddress_textEdited(const QString& arg1);
 	void on_udpPort_textEdited(const QString& arg1);
+	void on_audioActive_toggled(bool checked);
 	void on_applyBtn_clicked();
 	void onWidgetRolled(QWidget* widget, bool rollDown);
 	void onMenuDoubleClicked();
 	void on_boost_valueChanged(int value);
+	void on_volume_valueChanged(int value);
 	void tick();
 
 private:
@@ -64,6 +66,8 @@ private:
 	Real m_outputSampleRate;
 	Real m_rfBandwidth;
 	int m_boost;
+	bool m_audioActive;
+	int m_volume;
 	QString m_udpAddress;
 	int m_udpPort;
 	bool m_basicSettingsShown;
@@ -79,6 +83,7 @@ private:
 
     void blockApplySettings(bool block);
 	void applySettings();
+	void applySettingsImmediate();
 };
 
 #endif // INCLUDE_UDPSRCGUI_H
diff --git a/plugins/channel/udpsrc/udpsrcgui.ui b/plugins/channel/udpsrc/udpsrcgui.ui
index 9221c6fbe..9be79fa62 100644
--- a/plugins/channel/udpsrc/udpsrcgui.ui
+++ b/plugins/channel/udpsrc/udpsrcgui.ui
@@ -155,7 +155,7 @@
        </widget>
       </item>
       <item>
-       <widget class="QLabel" name="volimeText">
+       <widget class="QLabel" name="volumeText">
         <property name="text">
          <string>20</string>
         </property>
@@ -324,7 +324,7 @@
        </widget>
       </item>
       <item>
-       <widget class="QCheckBox" name="checkBox">
+       <widget class="QCheckBox" name="audioActive">
         <property name="toolTip">
          <string>Activate audio</string>
         </property>