diff --git a/Timeline/Annotation_Sequence.H b/Timeline/Annotation_Sequence.H
index 7f9bc62..01fe23c 100644
--- a/Timeline/Annotation_Sequence.H
+++ b/Timeline/Annotation_Sequence.H
@@ -24,7 +24,9 @@
 #include "Annotation_Region.H"
 #include "Timeline.H"
 
-class Annotation_Sequence : public Sequence, public Loggable
+#include "Track.H"
+
+class Annotation_Sequence : public Sequence
 {
 
 protected:
@@ -51,13 +53,14 @@ protected:
 
                     assert( t );
 
-                    t->track( this );
+                    t->add( this );
                 }
             }
         }
 
-    Annotation_Sequence ( ) : Sequence ( 0, 0, 0, 0 )
+    Annotation_Sequence ( ) : Sequence ( 0 )
         {
+            color( fl_darker( FL_GREEN ) );
         }
 
 public:
@@ -67,20 +70,15 @@ public:
 
     Fl_Cursor cursor ( void ) const { return FL_CURSOR_INSERT; }
 
-    Annotation_Sequence ( Track *track ) : Sequence( 0, 0, 0, 0 )
+    Annotation_Sequence ( Track *track ) : Sequence( track )
         {
-            _track = track;
-
             color( fl_darker(  FL_GREEN ) );
 
             log_create();
-
-//            labeltype( FL_NO_LABEL );
         }
 
-    Annotation_Sequence ( int X, int Y, int W, int H ) : Sequence ( X, Y, W, H )
+    Annotation_Sequence ( int X, int Y, int W, int H ) : Sequence ( 0 )
         {
-//            box( FL_UP_BOX );
         }
 
     ~Annotation_Sequence ( )
@@ -88,13 +86,6 @@ public:
             log_destroy();
         }
 
-/*     void */
-/*     draw ( void ) */
-/*         { */
-/* //            timeline->draw_measure_BBT( x(), y(), w(), h(), FL_WHITE ); */
-/*             Sequence::draw(); */
-/*         } */
-
     int handle ( int m )
         {
 
diff --git a/Timeline/Audio_Region.C b/Timeline/Audio_Region.C
index 45b0b36..ed188cf 100644
--- a/Timeline/Audio_Region.C
+++ b/Timeline/Audio_Region.C
@@ -23,6 +23,7 @@
 #include "Waveform.H"
 
 #include "Audio_Sequence.H"
+#include "Track.H"
 
 #include "dsp.h"
 
diff --git a/Timeline/Audio_Sequence.C b/Timeline/Audio_Sequence.C
index 08c2920..a45917b 100644
--- a/Timeline/Audio_Sequence.C
+++ b/Timeline/Audio_Sequence.C
@@ -24,6 +24,68 @@
 
 #include <Fl/fl_ask.H>
 
+#include "Track.H"
+
+Audio_Sequence::Audio_Sequence ( Track *track ) : Sequence( track )
+{
+
+    _track = track;
+
+    if ( track )
+        track->add( this );
+
+    log_create();
+
+    /* FIXME: temporary  */
+    labeltype( FL_NO_LABEL );
+
+}
+
+
+Audio_Sequence::~Audio_Sequence ( )
+{
+    log_destroy();
+}
+
+
+const Audio_Region *
+Audio_Sequence::capture ( void ) const
+{
+    return track()->capture();
+}
+
+void
+Audio_Sequence::get ( Log_Entry &e ) const
+        {
+            e.add( ":t", _track );
+            e.add( ":n", name() );
+        }
+
+void
+Audio_Sequence::set ( Log_Entry &e )
+{
+    for ( int i = 0; i < e.size(); ++i )
+    {
+        const char *s, *v;
+
+        e.get( i, &s, &v );
+
+        if ( ! strcmp( ":t", s ) )
+        {
+            int i;
+            sscanf( v, "%X", &i );
+            Track *t = (Track*)Loggable::find( i );
+
+            assert( t );
+
+            t->track( this );
+        }
+        else if ( ! strcmp( ":n", s ) )
+            name( strdup( v ) );
+    }
+}
+
+
 static
 void
 deurlify ( char *url )
diff --git a/Timeline/Audio_Sequence.H b/Timeline/Audio_Sequence.H
index 2ec7901..6b115a4 100644
--- a/Timeline/Audio_Sequence.H
+++ b/Timeline/Audio_Sequence.H
@@ -21,76 +21,32 @@
 
 #include "Sequence.H"
 #include "Audio_Region.H"
-#include "Track.H"
 
 #include <FL/Fl_Input.H>
 
-class Audio_Sequence : public Sequence, public Loggable
+class Audio_Sequence : public Sequence
 {
 
 protected:
 
-    virtual void get ( Log_Entry &e ) const
-        {
-            e.add( ":t", _track );
-            e.add( ":n", name() );
-        }
+    void get ( Log_Entry &e ) const;
 
-    void
-    set ( Log_Entry &e )
-        {
-            for ( int i = 0; i < e.size(); ++i )
-            {
-                const char *s, *v;
+    void set ( Log_Entry &e );
 
-                e.get( i, &s, &v );
-
-                if ( ! strcmp( ":t", s ) )
-                {
-                    int i;
-                    sscanf( v, "%X", &i );
-                    Track *t = (Track*)Loggable::find( i );
-
-                    assert( t );
-
-                    t->track( this );
-                }
-                else if ( ! strcmp( ":n", s ) )
-                    name( strdup( v ) );
-            }
-        }
-
-    Audio_Sequence ( ) : Sequence( 0, 0, 0, 0 )
+    Audio_Sequence ( ) : Sequence( 0 )
         {
         }
 
 
-
 public:
 
     LOG_CREATE_FUNC( Audio_Sequence );
 
     Fl_Cursor cursor ( void ) const { return FL_CURSOR_DEFAULT; }
 
-    Audio_Sequence ( Track *track ) : Sequence( 0, 0, 0, 0, track )
-        {
 
-            _track = track;
-
-            if ( track )
-                track->add( this );
-
-            log_create();
-
-                                                                 /* FIXME: temporary  */
-            labeltype( FL_NO_LABEL );
-
-        }
-
-    ~Audio_Sequence ( )
-        {
-            log_destroy();
-        }
+    Audio_Sequence ( Track *track );
+    ~Audio_Sequence ( );
 
 
     Sequence * clone_empty ( void )
@@ -107,7 +63,7 @@ public:
     void dump ( void );
     void remove_selected ( void );
 
-    const Audio_Region *capture ( void ) const { return track()->capture(); }
+    const Audio_Region *capture ( void ) const;
 
     nframes_t play ( sample_t *buf, nframes_t frame, nframes_t nframes, int channels );
 
diff --git a/Timeline/Control_Sequence.C b/Timeline/Control_Sequence.C
index 62ba038..f7069fa 100644
--- a/Timeline/Control_Sequence.C
+++ b/Timeline/Control_Sequence.C
@@ -29,7 +29,7 @@ bool Control_Sequence::draw_with_gradient = true;
 bool Control_Sequence::draw_with_polygon = true;
 bool Control_Sequence::draw_with_grid = true;
 
-Control_Sequence::Control_Sequence ( Track *track ) : Sequence( 0, 0, 0, 0 )
+Control_Sequence::Control_Sequence ( Track *track ) : Sequence( 0 )
 {
     init();
 
diff --git a/Timeline/Control_Sequence.H b/Timeline/Control_Sequence.H
index 1a58cfb..222d87c 100644
--- a/Timeline/Control_Sequence.H
+++ b/Timeline/Control_Sequence.H
@@ -23,7 +23,7 @@
 #include "Control_Point.H"
 #include "Port.H"
 
-class Control_Sequence : public Sequence, public Loggable
+class Control_Sequence : public Sequence
 {
 public:
 
@@ -46,7 +46,7 @@ protected:
     virtual void get ( Log_Entry &e ) const;
     void set ( Log_Entry &e );
 
-    Control_Sequence (  ) : Sequence( 0, 0, 0, 1 )
+    Control_Sequence (  ) : Sequence( 0 )
         {
             init();
         }
diff --git a/Timeline/Loggable.C b/Timeline/Loggable.C
index e005d15..e6a64d8 100644
--- a/Timeline/Loggable.C
+++ b/Timeline/Loggable.C
@@ -249,14 +249,7 @@ Loggable::do_this ( const char *s, bool reverse )
         Log_Entry e( sa );
 
 
-
-
-
-        assert( _class_map[ string( classname ) ] );
-
-/*         if ( ! _class_map[ string( classname ) ] ) */
-/*             printf( "error class %s is unregistered!\n", classname ); */
-/*         else */
+        ASSERT( _class_map[ string( classname ) ], "Journal contains an object of class \"%s\", but I don't know how to create such objects.", classname );
 
         {
             /* create */
diff --git a/Timeline/Loggable.H b/Timeline/Loggable.H
index fe6df6d..0a5cc19 100644
--- a/Timeline/Loggable.H
+++ b/Timeline/Loggable.H
@@ -37,23 +37,22 @@ using namespace std;
 #include "debug.h"
 
 /* welcome to C++ */
-class Loggable_ID
-{
+/* This class is just a dummy to allow base classes with null ids but
+ * whose children are really loggable. */
 
-protected:
+/* class Loggable_ID */
+/* { */
 
-    int _id;
+/* public: */
 
-public:
+/*     Loggable_ID ( )  { } */
+/*     virtual ~Loggable_ID ( ) { } */
 
-    Loggable_ID ( ) : _id( 0 ) { }
-    virtual ~Loggable_ID ( ) { }
+/*     virtual int id ( void ) const = 0; */
 
-    int id ( void ) { return _id; }
+/*     virtual const char *class_name ( void ) const = 0; */
 
-    virtual const char *class_name ( void ) const = 0;
-
-};
+/* }; */
 
 class Log_Entry;
 class Loggable;
@@ -77,8 +76,11 @@ typedef Loggable *(create_func)(Log_Entry &);
     LOG_NAME_FUNC( class );                                             \
 
 
+#define LOG_NOT_LOGGABLE_FUNC( class ) \
+    virtual const char *class_name ( void ) const { return #class ; } \
+
 class Logger;
-class Loggable : public Loggable_ID
+class Loggable
 {
 
     static FILE *_fp;
@@ -94,6 +96,7 @@ class Loggable : public Loggable_ID
 
 private:
 
+    int _id;
 
     char **_old_state;
     char **_new_state;
@@ -117,6 +120,8 @@ private:
 
 public:
 
+    int id ( void ) const { return _id; }
+
     static bool open ( const char *filename );
     static bool close ( void );
     static void undo ( void );
@@ -150,13 +155,19 @@ public:
             return _loggables[ id - 1 ];
         }
 
-    Loggable ( )
+    Loggable ( bool loggable=true )
         {
-            _id = ++_log_id;
-            _old_state = NULL;
-            _nest = 0;
+            if ( loggable )
+            {
+                _id = ++_log_id;
+                _old_state = NULL;
+                _nest = 0;
+
+                _loggables.push_back( this );
+            }
+            else
+                _id = 0;
 
-            _loggables.push_back( this );
         }
 
     /** must be called after construction in create() methods */
@@ -201,6 +212,9 @@ public:
     virtual void get ( Log_Entry &e ) const = 0;
     virtual void set ( Log_Entry &e ) = 0;
 
+    virtual const char *class_name ( void ) const = 0;
+
+
     static bool do_this ( const char *s, bool reverse );
 
 protected:
@@ -356,7 +370,7 @@ public:
     ADD( nframes_t, "%lu", (unsigned long)v );
     ADD( unsigned long, "%lu", v );
     ADD( const char *, "\"%s\"", v ? v : "" );
-    ADD( Loggable_ID *, "0x%X", v ? v->id() : 0 );
+    ADD( Loggable * , "0x%X", v ? v->id() : 0 );
     ADD( float, "%f", v );
     ADD( double, "%f", v );
 
diff --git a/Timeline/Sequence.C b/Timeline/Sequence.C
index 76897e5..41f40a6 100644
--- a/Timeline/Sequence.C
+++ b/Timeline/Sequence.C
@@ -30,20 +30,30 @@
 
 queue <Sequence_Widget *> Sequence::_delete_queue;
 
-Sequence::Sequence ( int X, int Y, int W, int H, Track *track ) : Fl_Widget( X, Y, W, H )
+Sequence::Sequence ( Track *track ) : Fl_Widget( 0, 0, 0, 0 ), Loggable( true  )
 {
-    _name = NULL;
+    init();
+
     _track = track;
 
-/*     if ( track ) */
-/*         track->add( this ); */
+//    log_create();
+}
+
+Sequence::Sequence ( int X, int Y, int W, int H ) : Fl_Widget( X, Y, W, H ), Loggable( false )
+{
+    init();
+}
+
+void
+Sequence::init ( void )
+{
+    _track = NULL;
+
+    _name = NULL;
 
     box( FL_DOWN_BOX );
-//    color( fl_darker( FL_GRAY ) );
     color(  FL_BACKGROUND_COLOR );
     align( FL_ALIGN_LEFT );
-
-//    log_create();
 }
 
 Sequence::~Sequence (  )
diff --git a/Timeline/Sequence.H b/Timeline/Sequence.H
index f0d4da0..c57dd72 100644
--- a/Timeline/Sequence.H
+++ b/Timeline/Sequence.H
@@ -38,11 +38,13 @@ class Sequence_Widget;
 
 /* This is the base class for all track types. */
 
-class Sequence : public Fl_Widget, public Loggable_ID
+class Sequence : public Fl_Widget, public Loggable
 {
 
     static queue <Sequence_Widget *> _delete_queue;
 
+    void init ( void );
+
 protected:
 
     Track *_track;                                              /* track this sequence belongs to */
@@ -58,7 +60,8 @@ public:
     /* welcome to C++ */
     LOG_NAME_FUNC( Sequence );
 
-    Sequence ( int X, int Y, int W, int H, Track *track=0 );
+    Sequence ( Track *track=0 );
+    Sequence ( int X, int Y, int W, int H );
 
     virtual ~Sequence (  );
 
diff --git a/Timeline/Sequence_Region.H b/Timeline/Sequence_Region.H
index 0f61fba..063925e 100644
--- a/Timeline/Sequence_Region.H
+++ b/Timeline/Sequence_Region.H
@@ -56,7 +56,7 @@ protected:
 
     Sequence_Region ( )
         {
-
+            color( FL_CYAN );
         }
 
     virtual ~Sequence_Region ( )
diff --git a/Timeline/Tempo_Sequence.H b/Timeline/Tempo_Sequence.H
index 0548f7f..a2840ee 100644
--- a/Timeline/Tempo_Sequence.H
+++ b/Timeline/Tempo_Sequence.H
@@ -27,6 +27,12 @@
 class Tempo_Sequence : public Sequence
 {
 
+protected:
+
+    /* not used */
+    void get ( Log_Entry &e ) const { }
+    void set ( Log_Entry &e ) { }
+
 public:
 
     Fl_Cursor cursor ( void ) const { return FL_CURSOR_DEFAULT; }
diff --git a/Timeline/Time_Sequence.H b/Timeline/Time_Sequence.H
index 52f96b4..09c6768 100644
--- a/Timeline/Time_Sequence.H
+++ b/Timeline/Time_Sequence.H
@@ -28,6 +28,12 @@ using std::list;
 class Time_Sequence : public Sequence
 {
 
+protected:
+
+    /* not used */
+    void get ( Log_Entry &e ) const { }
+    void set ( Log_Entry &e ) { }
+
 public:
 
     Fl_Cursor cursor ( void ) const { return FL_CURSOR_DEFAULT; }
diff --git a/Timeline/Timeline.C b/Timeline/Timeline.C
index a2fd69d..aed647f 100644
--- a/Timeline/Timeline.C
+++ b/Timeline/Timeline.C
@@ -918,7 +918,7 @@ Timeline::handle ( int m )
 
                             Track *t = new Track( name );
 
-                            Sequence *o = new Audio_Sequence( t );
+                            Audio_Sequence *o = new Audio_Sequence( t );
 
 //                            new Control_Sequence( t );
 
diff --git a/Timeline/Track.C b/Timeline/Track.C
index 545c609..d32f6f7 100644
--- a/Timeline/Track.C
+++ b/Timeline/Track.C
@@ -93,7 +93,7 @@ Track::cb_button ( Fl_Widget *w )
                     show_all_takes( take_menu->menu()[ v ].value() );
                     return;
                 case 1:                                         /* new */
-                    track( track()->clone_empty() );
+                    track( (Audio_Sequence*)track()->clone_empty() );
                     return;
             }
 
@@ -101,7 +101,7 @@ Track::cb_button ( Fl_Widget *w )
 
             for ( int i = takes->children(); i--; )
             {
-                Sequence *t = (Sequence*)takes->child( i );
+                Audio_Sequence *t = (Audio_Sequence*)takes->child( i );
                 if ( ! strcmp( s, t->name() ) )
                 {
                     track( t );
@@ -319,7 +319,7 @@ Track::size ( int v )
 
 
 void
-Track::add ( Sequence * t )
+Track::add ( Audio_Sequence * t )
 {
     takes->insert( *t, 0 );
     if ( ! t->name() )
@@ -335,7 +335,7 @@ Track::add ( Sequence * t )
 }
 
 void
-Track::remove ( Sequence *t )
+Track::remove ( Audio_Sequence *t )
 {
     takes->remove( t );
 
@@ -353,7 +353,7 @@ Track::remove ( Control_Sequence *t )
 }
 
 void
-Track::track ( Sequence * t )
+Track::track ( Audio_Sequence * t )
 {
     t->track( this );
 
@@ -441,12 +441,13 @@ Track::draw ( void )
 int
 Track::handle ( int m )
 {
-    Logger log( this );
 
     switch ( m )
     {
         case FL_MOUSEWHEEL:
         {
+            Logger log( this );
+
             if ( ! Fl::event_shift() )
                 return 0;
 
@@ -463,6 +464,7 @@ Track::handle ( int m )
         }
         case FL_PUSH:
         {
+            Logger log( this );
 
             int X = Fl::event_x();
             int Y = Fl::event_y();
diff --git a/Timeline/Track.H b/Timeline/Track.H
index 5e0d95f..86ed8fc 100644
--- a/Timeline/Track.H
+++ b/Timeline/Track.H
@@ -48,6 +48,11 @@ class Port;
 class Audio_Region;
 class Audio_File;
 
+
+//class Audio_Sequence;
+
+#include "Audio_Sequence.H"
+
 class Track : public Fl_Group, public Loggable
 {
 
@@ -74,7 +79,7 @@ private:
 
     enum { AUDIO } _type;
 
-    Sequence *_track;
+    Audio_Sequence *_track;
 
     Audio_Region *_capture;                                           /* capture region */
     Audio_File *_capture_af;                                    /* capture write source */
@@ -157,7 +162,7 @@ public:
 
                     if ( i )
                     {
-                        Sequence *t = (Sequence*)Loggable::find( i );
+                        Audio_Sequence *t = (Audio_Sequence*)Loggable::find( i );
 
                         /* FIXME: our track might not have been
                          * defined yet... what should we do about this
@@ -192,8 +197,8 @@ public:
     void remove ( Annotation_Sequence *t );
 
     void add ( Control_Sequence *t );
-    void add ( Sequence *t );
-    void remove ( Sequence *t );
+    void add ( Audio_Sequence *t );
+    void remove ( Audio_Sequence *t );
     void remove ( Control_Sequence *t );
 
     void select ( int X, int Y, int W, int H, bool include_control, bool merge_control );
@@ -243,8 +248,8 @@ public:
 
     static int width ( void ) { return 150; }
 
-    void track( Sequence * t );
-    Sequence * track ( void ) const { return _track; }
+    void track ( Audio_Sequence * t );
+    Audio_Sequence * track ( void ) const { return _track; }
 
     void draw ( void );
     int handle ( int m );
diff --git a/Timeline/main.C b/Timeline/main.C
index eb2d4b6..e70fb41 100644
--- a/Timeline/main.C
+++ b/Timeline/main.C
@@ -90,6 +90,7 @@ main ( int argc, char **argv )
     LOG_REGISTER_CREATE( Time_Point );
     LOG_REGISTER_CREATE( Tempo_Point );
     LOG_REGISTER_CREATE( Annotation_Point );
+    LOG_REGISTER_CREATE( Annotation_Region );
     LOG_REGISTER_CREATE( Control_Point );
     LOG_REGISTER_CREATE( Track );
     LOG_REGISTER_CREATE( Audio_Sequence );