diff --git a/Timeline/Audio_Region.C b/Timeline/Audio_Region.C
index c398799..0a9aae8 100644
--- a/Timeline/Audio_Region.C
+++ b/Timeline/Audio_Region.C
@@ -503,7 +503,7 @@ Audio_Region::draw_box( void )
 
     color = fl_color_average( color, sequence()->color(), 0.75f );
 
-    if ( this == ((Audio_Sequence*)sequence())->capture() )
+    if ( this == ((Audio_Sequence*)sequence())->capture_region() )
     {
         color = FL_RED;
     }
diff --git a/Timeline/Audio_Sequence.C b/Timeline/Audio_Sequence.C
index 0207be7..c10c1af 100644
--- a/Timeline/Audio_Sequence.C
+++ b/Timeline/Audio_Sequence.C
@@ -54,9 +54,9 @@ Audio_Sequence::~Audio_Sequence ( )
 
 
 const Audio_Region *
-Audio_Sequence::capture ( void ) const
+Audio_Sequence::capture_region ( void ) const
 {
-    return track()->capture();
+    return track()->capture_region();
 }
 
 void
diff --git a/Timeline/Audio_Sequence.H b/Timeline/Audio_Sequence.H
index 4b8eb88..ff11f3c 100644
--- a/Timeline/Audio_Sequence.H
+++ b/Timeline/Audio_Sequence.H
@@ -66,7 +66,7 @@ public:
     void dump ( void );
     void remove_selected ( void );
 
-    const Audio_Region *capture ( void ) const;
+    const Audio_Region *capture_region ( void ) const;
 
     nframes_t play ( sample_t *buf, nframes_t frame, nframes_t nframes, int channels );
 
diff --git a/Timeline/Engine/Audio_Region.C b/Timeline/Engine/Audio_Region.C
index 94a19b0..f83741c 100644
--- a/Timeline/Engine/Audio_Region.C
+++ b/Timeline/Engine/Audio_Region.C
@@ -209,6 +209,7 @@ Audio_Region::write ( nframes_t nframes )
     return nframes;
 }
 
+/* THREAD: IO */
 /** finalize region capture. Assumes that this *is* a captured region
  and that no other regions refer to the same source */
 bool
@@ -222,8 +223,10 @@ Audio_Region::finalize ( nframes_t frame )
     _clip->open();
 
     /* FIXME: should we attempt to truncate the file? */
-
+    Fl::lock();
     redraw();
+    Fl::awake();
+    Fl::unlock();
 
     return true;
 }
diff --git a/Timeline/Engine/Disk_Stream.C b/Timeline/Engine/Disk_Stream.C
index 0d7e8ef..f6afc02 100644
--- a/Timeline/Engine/Disk_Stream.C
+++ b/Timeline/Engine/Disk_Stream.C
@@ -122,7 +122,7 @@ Disk_Stream::base_flush ( bool is_output )
 
 }
 
-/** stop the IO thread, block until it finishes. */
+/** stop the IO thread. */
 void
 Disk_Stream::shutdown ( void )
 {
@@ -132,11 +132,15 @@ Disk_Stream::shutdown ( void )
     block_processed();
 
     if ( _thread )
-        pthread_join( _thread, NULL );
+        pthread_detach( _thread );
+
+        /* we must block until the thread returns, because it might
+         * still have data left to process in its buffers--and we
+         * don't want to delete any of the datastructures it's using
+         * until it finishes with them. */
+//        pthread_join( _thread, NULL );
 
     _thread = 0;
-
-    _terminate = false;
 }
 
 Track *
diff --git a/Timeline/Engine/Playback_DS.C b/Timeline/Engine/Playback_DS.C
index 9ab8559..49283c8 100644
--- a/Timeline/Engine/Playback_DS.C
+++ b/Timeline/Engine/Playback_DS.C
@@ -196,6 +196,8 @@ Playback_DS::disk_thread ( void )
 #ifndef AVOID_UNNECESSARY_COPYING
     delete[] cbuf;
 #endif
+
+    _terminate = false;
 }
 
 /* THREAD: RT */
diff --git a/Timeline/Engine/Record_DS.C b/Timeline/Engine/Record_DS.C
index 8814e7d..885b267 100644
--- a/Timeline/Engine/Record_DS.C
+++ b/Timeline/Engine/Record_DS.C
@@ -31,6 +31,15 @@
 
 #include "util/debug.h"
 
+const Audio_Region *
+Record_DS::capture_region ( void ) const
+{
+    if ( _capture )
+        return _capture->region;
+    else
+        return NULL;
+}
+
 /* THREAD: IO */
 /** write /nframes/ from buf to the capture file of the attached track */
 void
@@ -43,7 +52,7 @@ Record_DS::write_block ( sample_t *buf, nframes_t nframes )
 
 //    timeline->wrlock();
 
-    track()->write( buf, nframes );
+    track()->write( _capture, buf, nframes );
 
     _frames_written += nframes;
 
@@ -181,6 +190,14 @@ Record_DS::disk_thread ( void )
 #ifndef AVOID_UNNECESSARY_COPYING
     delete[] cbuf;
 #endif
+
+    /* now finalize the recording */
+    track()->finalize( _capture, _stop_frame );
+
+    delete _capture;
+    _capture = NULL;
+
+    _terminate = false;
 }
 
 
@@ -200,7 +217,9 @@ Record_DS::start ( nframes_t frame )
 
     _frame = frame;
 
-    track()->record( frame );
+    _capture = new Track::Capture;
+
+    track()->record( _capture, frame );
 
     run();
 
@@ -224,8 +243,6 @@ Record_DS::stop ( nframes_t frame )
 
     shutdown();
 
-    track()->stop( frame );
-
     DMESSAGE( "recording finished" );
 }
 
diff --git a/Timeline/Engine/Record_DS.H b/Timeline/Engine/Record_DS.H
index fa7d4dc..e83181f 100644
--- a/Timeline/Engine/Record_DS.H
+++ b/Timeline/Engine/Record_DS.H
@@ -24,6 +24,7 @@
 #include "Audio_File_SF.H"
 class Audio_File;
 class Peak_Writer;
+class Track::Capture;
 
 class Record_DS : public Disk_Stream
 {
@@ -32,6 +33,7 @@ class Record_DS : public Disk_Stream
     Record_DS ( const Record_DS &rhs );
     Record_DS & operator= ( const Record_DS &rhs );
 
+    Track::Capture *_capture;
 
     nframes_t _frames_written;
     volatile nframes_t _stop_frame;
@@ -53,6 +55,7 @@ public:
             sem_destroy( &_blocks );
             sem_init( &_blocks, 0, 0 );
 
+            _capture = NULL;
             _recording = false;
             _stop_frame = -1;
             _frames_written = 0;
@@ -60,6 +63,7 @@ public:
 
 /*     bool seek_pending ( void ); */
 /*     void seek ( nframes_t frame ); */
+    const Audio_Region * capture_region ( void ) const;
 
     void start ( nframes_t frame );
     void stop ( nframes_t frame );
diff --git a/Timeline/Engine/Timeline.C b/Timeline/Engine/Timeline.C
index 96d8e40..490dded 100644
--- a/Timeline/Engine/Timeline.C
+++ b/Timeline/Engine/Timeline.C
@@ -34,12 +34,14 @@ Timeline::record ( void )
 
     Loggable::block_start();
 
+    nframes_t frame = transport->frame;
+
     for ( int i = tracks->children(); i-- ; )
     {
         Track *t = (Track*)tracks->child( i );
 
         if ( t->armed() && t->record_ds )
-            t->record_ds->start( transport->frame );
+            t->record_ds->start( frame );
     }
 
     deactivate();
diff --git a/Timeline/Engine/Track.C b/Timeline/Engine/Track.C
index ca046fe..99b7479 100644
--- a/Timeline/Engine/Track.C
+++ b/Timeline/Engine/Track.C
@@ -29,6 +29,15 @@
 /* Engine */
 /**********/
 
+const Audio_Region *
+Track::capture_region ( void ) const
+{
+    if ( record_ds )
+        return record_ds->capture_region();
+    else
+        return NULL;
+}
+
 void
 Track::update_port_names ( void )
 {
@@ -209,57 +218,47 @@ uuid ( void )
 }
 
 
+
 /* THREAD: IO */
 /** create capture region and prepare to record */
 void
-Track::record ( nframes_t frame )
+Track::record ( Capture *c,  nframes_t frame )
 {
-    assert( ! _capture );
-    assert( ! _capture_af );
-
     char pat[256];
 
     snprintf( pat, sizeof( pat ), "%s-%llu", name(), uuid() );
 
+    c->audio_file = Audio_File_SF::create( pat, engine->sample_rate(), input.size(), Track::capture_format );
 
-    _capture_af = Audio_File_SF::create( pat, engine->sample_rate(), input.size(), Track::capture_format );
-
-    if ( ! _capture_af )
-    {
-        /* ERROR */
-
-    }
+    if ( ! c->audio_file )
+        FATAL( "Could not create file for new capture!" );
 
     /* open it again for reading in the GUI thread */
-    Audio_File *af = Audio_File::from_file( _capture_af->name() );
+    Audio_File *af = Audio_File::from_file( c->audio_file->name() );
 
-    _capture = new Audio_Region( af, sequence(), frame );
+    c->region = new Audio_Region( af, sequence(), frame );
 
-    _capture->prepare();
+    c->region->prepare();
 }
 
 /* THREAD: IO */
 /** write a block to the (already opened) capture file */
 void
-Track::write ( sample_t *buf, nframes_t nframes )
+Track::write ( Capture *c, sample_t *buf, nframes_t nframes )
 {
-    nframes_t l = _capture_af->write( buf, nframes );
+    nframes_t l = c->audio_file->write( buf, nframes );
 
-    _capture->write( l );
+    c->region->write( l );
 }
 
 #include <stdio.h>
 
 /* THREAD: IO */
 void
-Track::stop ( nframes_t frame )
+Track::finalize ( Capture *c, nframes_t frame )
 {
-    _capture->finalize( frame );
+    c->region->finalize( frame );
+    c->audio_file->finalize();
 
-    _capture = NULL;
-
-    _capture_af->finalize();
-
-    delete _capture_af;
-    _capture_af = NULL;
+    delete c->audio_file;
 }
diff --git a/Timeline/Track.C b/Timeline/Track.C
index 6aee411..0cef2df 100644
--- a/Timeline/Track.C
+++ b/Timeline/Track.C
@@ -111,8 +111,6 @@ Track::cb_button ( Fl_Widget *w )
 void
 Track::init ( void )
 {
-    _capture = NULL;
-    _capture_af = NULL;
     _sequence = NULL;
     _name = NULL;
     _selected = false;
diff --git a/Timeline/Track.H b/Timeline/Track.H
index 26b472d..8f2397d 100644
--- a/Timeline/Track.H
+++ b/Timeline/Track.H
@@ -69,6 +69,12 @@ public:
 
     static const char *capture_format;
 
+    struct Capture
+    {
+        Audio_File *audio_file;
+        Audio_Region *region;
+    };
+
 private:
 
     static int _soloing;
@@ -85,9 +91,6 @@ private:
 
     Audio_Sequence *_sequence;
 
-    Audio_Region *_capture;                                           /* capture region */
-    Audio_File *_capture_af;                                    /* capture write source */
-
     bool configure_outputs ( int n );
     bool configure_inputs ( int n );
 
@@ -264,14 +267,15 @@ public:
     int handle ( int m );
 
 
-    const Audio_Region *capture ( void ) const { return _capture; }
-
     /* Engine */
+    const Audio_Region *capture_region ( void ) const;
+
     void resize_buffers ( nframes_t nframes );
     nframes_t process ( nframes_t nframes );
     void seek ( nframes_t frame );
-    void record ( nframes_t nframes );
-    void write ( sample_t *buf, nframes_t nframes );
-    void stop ( nframes_t nframes );
+
+    void record ( Capture *c, nframes_t frame );
+    void write ( Capture *c, sample_t *buf, nframes_t nframes );
+    void finalize ( Capture *c, nframes_t frame );
 
 };