diff --git a/src/blacksound/sampleprovider/resourcesound.cpp b/src/blacksound/sampleprovider/resourcesound.cpp
index 2dd312b27..7a9d8fb7d 100644
--- a/src/blacksound/sampleprovider/resourcesound.cpp
+++ b/src/blacksound/sampleprovider/resourcesound.cpp
@@ -12,6 +12,7 @@
 #include "audioutilities.h"
 #include "blackmisc/fileutils.h"
 #include "blackmisc/stringutils.h"
+#include <QCoreApplication>
 
 using namespace BlackMisc;
 using namespace BlackSound::Wav;
@@ -20,30 +21,53 @@ namespace BlackSound
 {
     namespace SampleProvider
     {
+        CResourceSound::CResourceSound()
+        {
+            m_data = new CResourceSoundData;
+        }
+
         CResourceSound::CResourceSound(const QString &audioFileName)
         {
-            CWavFile wavFile;
-            m_fn.clear();
-            m_samples.clear();
-            if (wavFile.open(audioFileName))
+            m_data = new CResourceSoundData;
+            m_data->fileName = audioFileName;
+        }
+
+        bool CResourceSound::load()
+        {
+            if (m_data->fileName.isEmpty()) { return false; }
+
+            QObject *parent = QCoreApplication::instance();
+            Q_ASSERT(parent);
+            CWorker *worker = CWorker::fromTask(parent, "loadResourceSound", [this]()
             {
-                if (wavFile.fileFormat().sampleType() == QAudioFormat::Float)
+                CWavFile wavFile;
+
+                m_data->samples.clear();
+                if (wavFile.open(m_data->fileName))
                 {
-                    // Not implemented
-                    // m_samples = convertFloatBytesTo16BitPCM(wavFile.audioData());
+                    if (wavFile.fileFormat().sampleType() == QAudioFormat::Float)
+                    {
+                        // Not implemented
+                        // m_samples = convertFloatBytesTo16BitPCM(wavFile.audioData());
+                    }
+                    else
+                    {
+                        m_data->samples = convertBytesTo32BitFloatPCM(wavFile.audioData());
+                    }
                 }
-                else
-                {
-                    m_samples = convertBytesTo32BitFloatPCM(wavFile.audioData());
-                }
-                m_fn = audioFileName;
-            }
+            });
+            worker->then([this]()
+            {
+                m_data->isLoaded = true;
+            });
+
+            return worker ? true : false;
         }
 
         bool CResourceSound::isSameFileName(const QString &fn) const
         {
             if (fn.isEmpty()) { return false; }
-            return stringCompare(fn, m_fn, CFileUtils::osFileNameCaseSensitivity());
+            return stringCompare(fn, m_data->fileName, CFileUtils::osFileNameCaseSensitivity());
         }
     } // ns
 } // ns
diff --git a/src/blacksound/sampleprovider/resourcesound.h b/src/blacksound/sampleprovider/resourcesound.h
index 0a6284a15..7a271b601 100644
--- a/src/blacksound/sampleprovider/resourcesound.h
+++ b/src/blacksound/sampleprovider/resourcesound.h
@@ -13,33 +13,53 @@
 
 #include "blacksound/blacksoundexport.h"
 #include "blacksound/wav/wavfile.h"
+#include "blackmisc/worker.h"
 
 #include <QString>
 #include <QVector>
+#include <QExplicitlySharedDataPointer>
+#include <atomic>
 
 namespace BlackSound
 {
     namespace SampleProvider
     {
+
+        //! CResourceSound shared data
+        struct CResourceSoundData : public QSharedData
+        {
+            QString fileName; //!< file name
+            bool isLoaded = false; //!< is audio loaded
+            QVector<float> samples; //!< audio samples
+        };
+
         //! File from resources
         class CResourceSound
         {
         public:
+            //! Constructor
+            CResourceSound();
+
             //! Sound of audio file
             CResourceSound(const QString &audioFileName);
 
+            //! Load the attached resource file
+            bool load();
+
+            //! Is resource already loaded?
+            bool isLoaded() { return m_data->isLoaded; }
+
             //! Audio data
-            const QVector<float> &audioData() const { return m_samples; }
+            const QVector<float> &audioData() const { return m_data->samples; }
 
             //! Corresponding file
-            const QString &getFileName() { return m_fn; }
+            const QString &getFileName() { return m_data->fileName; }
 
             //! Is same file?
             bool isSameFileName(const QString &fn) const;
 
         private:
-            QString m_fn; //!< file name
-            QVector<float> m_samples;
+            QExplicitlySharedDataPointer<CResourceSoundData> m_data;
         };
     } // ns
 } // ns
diff --git a/src/blacksound/sampleprovider/resourcesoundsampleprovider.cpp b/src/blacksound/sampleprovider/resourcesoundsampleprovider.cpp
index 0b195fc39..26426186d 100644
--- a/src/blacksound/sampleprovider/resourcesoundsampleprovider.cpp
+++ b/src/blacksound/sampleprovider/resourcesoundsampleprovider.cpp
@@ -15,6 +15,8 @@ namespace BlackSound
 
         int CResourceSoundSampleProvider::readSamples(QVector<float> &samples, qint64 count)
         {
+            if (! m_resourceSound.isLoaded()) { return 0; }
+
             if (count > m_tempBufferSize)
             {
                 qDebug() << "Count too large for temp buffer" << count;
diff --git a/src/blacksound/sampleprovider/samples.cpp b/src/blacksound/sampleprovider/samples.cpp
index be979b67b..28cfa0fe8 100644
--- a/src/blacksound/sampleprovider/samples.cpp
+++ b/src/blacksound/sampleprovider/samples.cpp
@@ -23,11 +23,7 @@ namespace BlackSound
             return samples;
         }
 
-        Samples::Samples() :
-            m_crackle(CFileUtils::soundFilePathAndFileName(fnCrackle())),
-            m_click(CFileUtils::soundFilePathAndFileName(fnClick())),
-            m_whiteNoise(CFileUtils::soundFilePathAndFileName(fnWhiteNoise())),
-            m_hfWhiteNoise(CFileUtils::soundFilePathAndFileName(fnHfWhiteNoise()))
+        Samples::Samples()
         {
             this->initSounds();
         }
@@ -36,13 +32,32 @@ namespace BlackSound
         {
             const CSettings settings = m_audioSettings.get();
             QString f = settings.getNotificationFilePath(fnCrackle());
-            if (!m_crackle.isSameFileName(f)) { m_crackle = CResourceSound(f); }
+            if (!m_crackle.isSameFileName(f))
+            {
+                m_crackle = CResourceSound(f);
+                m_crackle.load();
+            }
 
             f = settings.getNotificationFilePath(fnClick());
-            if (!m_click.isSameFileName(f)) { m_click = CResourceSound(f); }
+            if (!m_click.isSameFileName(f))
+            {
+                m_click = CResourceSound(f);
+                m_click.load();
+            }
 
             f = settings.getNotificationFilePath(fnWhiteNoise());
-            if (!m_whiteNoise.isSameFileName(f)) { m_whiteNoise = CResourceSound(f); }
+            if (!m_whiteNoise.isSameFileName(f))
+            {
+                m_whiteNoise = CResourceSound(f);
+                m_whiteNoise.load();
+            }
+
+            f = settings.getNotificationFilePath(fnHfWhiteNoise());
+            if (!m_hfWhiteNoise.isSameFileName(f))
+            {
+                m_hfWhiteNoise = CResourceSound(f);
+                m_hfWhiteNoise.load();
+            }
         }
 
         void Samples::onSettingsChanged()
diff --git a/src/blacksound/sampleprovider/samples.h b/src/blacksound/sampleprovider/samples.h
index c107546be..19c94501a 100644
--- a/src/blacksound/sampleprovider/samples.h
+++ b/src/blacksound/sampleprovider/samples.h
@@ -36,7 +36,7 @@ namespace BlackSound
             const CResourceSound &crackle()    const { return m_crackle; }
             const CResourceSound &click()      const { return m_click; }
             const CResourceSound &whiteNoise() const { return m_whiteNoise; }
-            const CResourceSound hfWhiteNoise() const { return m_hfWhiteNoise; }
+            const CResourceSound &hfWhiteNoise() const { return m_hfWhiteNoise; }
             //! @}
 
             //! Play the click sound