diff --git a/Mixer.cpp b/Mixer.cpp
index 78e39e1..d3e585e 100644
--- a/Mixer.cpp
+++ b/Mixer.cpp
@@ -746,7 +746,7 @@ void Mixer::groupSelection()
     }
 }
 
-void Mixer::groupAll()
+void Mixer::groupAll(bool only_active)
 {
     // obvious cancel
     if (session_->empty())
@@ -759,16 +759,38 @@ void Mixer::groupAll()
     // remember groups before emptying the session
     std::list<SourceList> allgroups = session_->getMixingGroups();
 
-    // empty the session (does not delete sources)
-    for ( Source *s = session_->popSource(); s != nullptr; s = session_->popSource()) {
-        if ( sessiongroup->import(s) )
-            detach(s);
+    // loop over sources from the current mixer session
+    for(auto it = session_->begin(); it != session_->end(); ) {
+        // if request for only active, take only active source
+        // and if could import the source in the new session group
+        if ( ( !only_active || (*it)->active() ) && sessiongroup->import( *it ) ) {
+            // detatch the source from mixer
+            detach( *it );
+            // take out source from session and go to next (does not delete the source)
+            it = session_->removeSource( *it );
+        }
+        // otherwise just iterate (leave source in mixer)
         else
-            break;
+            ++it;
     }
 
+    // successful creation of a session group
     if (sessiongroup->session()->size() > 0) {
 
+        // if a clone was left orphan in the mixer current session, take in in the group
+        for(auto it = session_->begin(); it != session_->end(); ) {
+            CloneSource *cs = dynamic_cast<CloneSource*>(*it);
+            if ( cs != nullptr && session_->find( cs->origin() ) == session_->end() && sessiongroup->import( *it ) ) {
+                // detatch the source from mixer
+                detach( *it );
+                // take out source from session and go to next (does not delete the source)
+                it = session_->removeSource( *it );
+            }
+            // otherwise just iterate (leave source in mixer)
+            else
+                ++it;
+        }
+
         // recreate groups in session group
         for (auto git = allgroups.begin(); git != allgroups.end(); ++git)
             sessiongroup->session()->link( *git );
diff --git a/Mixer.h b/Mixer.h
index 2388d4a..39a05e3 100644
--- a/Mixer.h
+++ b/Mixer.h
@@ -67,7 +67,7 @@ public:
     // operations on selection
     void deleteSelection  ();
     void groupSelection ();
-    void groupAll ();
+    void groupAll (bool only_active = false);
     void ungroupAll ();
     void groupSession ();
 
diff --git a/Session.cpp b/Session.cpp
index 5f27c56..952e65d 100644
--- a/Session.cpp
+++ b/Session.cpp
@@ -305,8 +305,10 @@ SourceList::iterator Session::deleteSource(Source *s)
     return its;
 }
 
-void Session::removeSource(Source *s)
+SourceList::iterator Session::removeSource(Source *s)
 {
+    SourceList::iterator ret = sources_.end();
+
     // lock before change
     access_.lock();
 
@@ -320,11 +322,13 @@ void Session::removeSource(Source *s)
         if (s->mixingGroup() != nullptr)
             s->mixingGroup()->detach(s);
         // erase the source from the update list & get next element
-        sources_.erase(its);
+        ret = sources_.erase(its);
     }
 
     // unlock access
     access_.unlock();
+
+    return ret;
 }
 
 Source *Session::popSource()
diff --git a/Session.h b/Session.h
index 97424b6..d748a9c 100644
--- a/Session.h
+++ b/Session.h
@@ -57,11 +57,11 @@ public:
 
     // remove this source from the session
     // Does not delete the source
-    void removeSource(Source *s);
+    SourceList::iterator removeSource (Source *s);
 
     // get ptr to front most source and remove it from the session
     // Does not delete the source
-    Source *popSource();
+    Source *popSource ();
 
     // management of list of sources
     bool empty() const;
diff --git a/SourceList.cpp b/SourceList.cpp
index 7a7b4ab..b107fe0 100644
--- a/SourceList.cpp
+++ b/SourceList.cpp
@@ -45,6 +45,17 @@ SourceList playable_only (const SourceList &list)
     return pl;
 }
 
+bool notactive (const Source *s) { return !s->active(); }
+
+SourceList active_only (const SourceList &list)
+{
+    SourceList pl = list;
+
+    pl.remove_if(notactive);
+
+    return pl;
+}
+
 SourceList depth_sorted(const SourceList &list)
 {
     SourceList sl = list;
diff --git a/SourceList.h b/SourceList.h
index 69c1460..a557425 100644
--- a/SourceList.h
+++ b/SourceList.h
@@ -12,6 +12,7 @@ typedef std::list<Source *> SourceList;
 typedef std::list<SourceCore *> SourceCoreList;
 
 SourceList playable_only (const SourceList &list);
+SourceList active_only   (const SourceList &list);
 SourceList depth_sorted  (const SourceList &list);
 SourceList mixing_sorted (const SourceList &list, glm::vec2 center = glm::vec2(0.f, 0.f));
 SourceList intersect     (const SourceList &first, const SourceList &second);
diff --git a/UserInterfaceManager.cpp b/UserInterfaceManager.cpp
index f3df058..e824354 100644
--- a/UserInterfaceManager.cpp
+++ b/UserInterfaceManager.cpp
@@ -985,13 +985,13 @@ void UserInterface::showMenuFile()
 
     // GROUP
     ImGui::Separator();
-    if (ImGuiToolkit::MenuItemIcon(11, 2, " Group all sources", false, Mixer::manager().numSource() > 0)) {
-        // create a new group session with all sources
-        Mixer::manager().groupAll();
+    if (ImGuiToolkit::MenuItemIcon(11, 2, " Group active sources", false, Mixer::manager().numSource() > 0)) {
+        // create a new group session with only active sources
+        Mixer::manager().groupAll( true );
         // switch pannel to show first source (created)
         navigator.showPannelSource(0);
     }
-    if (ImGuiToolkit::MenuItemIcon(7, 2, " Expand all groups", false, Mixer::manager().numSource() > 0)) {
+    if (ImGuiToolkit::MenuItemIcon(7, 2, " Expand groups", false, Mixer::manager().numSource() > 0)) {
         // create a new group session with all sources
         Mixer::manager().ungroupAll();
     }