diff --git a/src/core/base/IMixer.h b/src/core/base/IMixer.h
index 2cb1814..2b554bd 100644
--- a/src/core/base/IMixer.h
+++ b/src/core/base/IMixer.h
@@ -74,12 +74,13 @@ namespace talcs {
         virtual void eraseSource(const SourceIterator &srcIt) = 0;
         virtual void removeAllSources() = 0;
 
-        virtual void moveSource(const SourceIterator &pos, const SourceIterator &target) = 0;
+        virtual void moveSource(const SourceIterator &pos, const SourceIterator &first, const SourceIterator &last) = 0;
         virtual void swapSource(const SourceIterator &first, const SourceIterator &second) = 0;
 
         virtual QList<T *> sources() const = 0;
         virtual SourceIterator firstSource() const = 0;
         virtual SourceIterator lastSource() const = 0;
+        virtual SourceIterator sourceAt(int index) const = 0;
         virtual SourceIterator findSource(T *src) const = 0;
 
         virtual SourceIterator nullIterator() const = 0;
diff --git a/src/core/base/IMixer_p.h b/src/core/base/IMixer_p.h
index dbf48f6..d3510f7 100644
--- a/src/core/base/IMixer_p.h
+++ b/src/core/base/IMixer_p.h
@@ -95,8 +95,8 @@ namespace talcs {
             return SrcIt(std::find(sourceList.cbegin(), sourceList.cend(), src), &sourceList);
         }
 
-        void moveSource(const SrcIt &pos, const SrcIt &target) {
-            sourceList.splice(pos.m_it, sourceList, target.m_it);
+        void moveSource(const SrcIt &pos, const SrcIt &first, const SrcIt &last) {
+            sourceList.splice(pos.m_it, sourceList, first.m_it, last.m_it);
         }
 
         void swapSource(const SrcIt &first, const SrcIt &second) {
@@ -138,6 +138,13 @@ namespace talcs {
             return sourceIteratorEnd().previous();
         }
 
+        SrcIt sourceAt(int index) const {
+            auto it = sourceList.cbegin();
+            while (index--)
+                it++;
+            return SrcIt(it, &sourceList);
+        }
+
         int soloCounter = 0;
 
         void setSourceSolo(T *src, bool isSolo) {
diff --git a/src/core/source/MixerAudioSource.cpp b/src/core/source/MixerAudioSource.cpp
index c13320b..1915a33 100644
--- a/src/core/source/MixerAudioSource.cpp
+++ b/src/core/source/MixerAudioSource.cpp
@@ -144,11 +144,10 @@ namespace talcs {
         d->removeAllSources();
     }
 
-    void MixerAudioSource::moveSource(const MixerAudioSource::SourceIterator &pos,
-                                      const MixerAudioSource::SourceIterator &target) {
+    void MixerAudioSource::moveSource(const MixerAudioSource::SourceIterator &pos, const SourceIterator &first, const SourceIterator &last) {
         Q_D(MixerAudioSource);
         QMutexLocker locker(&d->mutex);
-        d->moveSource(pos, target);
+        d->moveSource(pos, first, last);
     }
 
     void MixerAudioSource::swapSource(const MixerAudioSource::SourceIterator &first,
@@ -173,6 +172,11 @@ namespace talcs {
         return d->lastSource();
     }
 
+    MixerAudioSource::SourceIterator MixerAudioSource::sourceAt(int index) const {
+        Q_D(const MixerAudioSource);
+        return d->sourceAt(index);
+    }
+
     MixerAudioSource::SourceIterator MixerAudioSource::findSource(AudioSource *src) const {
         Q_D(const MixerAudioSource);
         return d->findSource(src);
diff --git a/src/core/source/MixerAudioSource.h b/src/core/source/MixerAudioSource.h
index 68f5c79..325b742 100644
--- a/src/core/source/MixerAudioSource.h
+++ b/src/core/source/MixerAudioSource.h
@@ -48,12 +48,13 @@ namespace talcs {
         void eraseSource(const SourceIterator &srcIt) override;
         void removeAllSources() override;
 
-        void moveSource(const SourceIterator &pos, const SourceIterator &target) override;
+        void moveSource(const SourceIterator &pos, const SourceIterator &first, const SourceIterator &last) override;
         void swapSource(const SourceIterator &first, const SourceIterator &second) override;
 
         QList<AudioSource *> sources() const override;
         SourceIterator firstSource() const override;
         SourceIterator lastSource() const override;
+        SourceIterator sourceAt(int index) const override;
         SourceIterator findSource(AudioSource *src) const override;
 
         SourceIterator nullIterator() const override;
diff --git a/src/core/source/PositionableMixerAudioSource.cpp b/src/core/source/PositionableMixerAudioSource.cpp
index aeb78ce..5eb304b 100644
--- a/src/core/source/PositionableMixerAudioSource.cpp
+++ b/src/core/source/PositionableMixerAudioSource.cpp
@@ -184,11 +184,10 @@ namespace talcs {
         d->removeAllSources();
     }
 
-    void PositionableMixerAudioSource::moveSource(const PositionableMixerAudioSource::SourceIterator &pos,
-                                                  const PositionableMixerAudioSource::SourceIterator &target) {
+    void PositionableMixerAudioSource::moveSource(const PositionableMixerAudioSource::SourceIterator &pos, const SourceIterator &first, const SourceIterator &last) {
         Q_D(PositionableMixerAudioSource);
         QMutexLocker locker(&d->mutex);
-        d->moveSource(pos, target);
+        d->moveSource(pos, first, last);
     }
 
     void PositionableMixerAudioSource::swapSource(const PositionableMixerAudioSource::SourceIterator &first,
@@ -213,6 +212,11 @@ namespace talcs {
         return d->lastSource();
     }
 
+    PositionableMixerAudioSource::SourceIterator PositionableMixerAudioSource::sourceAt(int index) const {
+        Q_D(const PositionableMixerAudioSource);
+        return d->sourceAt(index);
+    }
+
     PositionableMixerAudioSource::SourceIterator
     PositionableMixerAudioSource::findSource(PositionableAudioSource *src) const {
         Q_D(const PositionableMixerAudioSource);
diff --git a/src/core/source/PositionableMixerAudioSource.h b/src/core/source/PositionableMixerAudioSource.h
index 745c5b7..c8bc01e 100644
--- a/src/core/source/PositionableMixerAudioSource.h
+++ b/src/core/source/PositionableMixerAudioSource.h
@@ -50,12 +50,13 @@ namespace talcs {
         void eraseSource(const SourceIterator &srcIt) override;
         void removeAllSources() override;
 
-        void moveSource(const SourceIterator &pos, const SourceIterator &target) override;
+        void moveSource(const SourceIterator &pos, const SourceIterator &first, const SourceIterator &last) override;
         void swapSource(const SourceIterator &first, const SourceIterator &second) override;
 
         QList<PositionableAudioSource *> sources() const override;
         SourceIterator firstSource() const override;
         SourceIterator lastSource() const override;
+        SourceIterator sourceAt(int index) const override;
         SourceIterator findSource(PositionableAudioSource *src) const override;
 
         SourceIterator nullIterator() const override;
diff --git a/tests/UnitTests/IMixer/test.cpp b/tests/UnitTests/IMixer/test.cpp
index d9f8c79..22a1d73 100644
--- a/tests/UnitTests/IMixer/test.cpp
+++ b/tests/UnitTests/IMixer/test.cpp
@@ -225,7 +225,7 @@ private slots:
         QCOMPARE(mixer.lastSource(), itList[3]);
         QCOMPARE(mixer.findSource(src + 2), itList[2]);
 
-        mixer.moveSource(itList[1], itList[3]);
+        mixer.moveSource(itList[1], itList[3], mixer.nullIterator());
         QList<PositionableAudioSource *> expectedSrcList = {src, src + 3, src + 1, src + 2};
         QCOMPARE(mixer.sources(), expectedSrcList);