diff --git a/Mixer/Mixer.C b/Mixer/Mixer.C
index 9a10543..608305a 100644
--- a/Mixer/Mixer.C
+++ b/Mixer/Mixer.C
@@ -36,7 +36,7 @@ Fl_Single_Window *main_window;
 #include <FL/Boxtypes.H>
 
 int
-main ( int argc, char **arv )
+main ( int argc, char **argv )
 {
     Fl::get_system_colors();
     Fl::scheme( "plastic" );
@@ -61,7 +61,7 @@ main ( int argc, char **arv )
         o->end();
     }
     o->end();
-    o->show();
+    o->show( argc, argv );
 
     while ( 1 )
     {
diff --git a/Timeline/Annotation_Sequence.H b/Timeline/Annotation_Sequence.H
index 4ff7219..c404ac2 100644
--- a/Timeline/Annotation_Sequence.H
+++ b/Timeline/Annotation_Sequence.H
@@ -77,9 +77,9 @@ public:
             log_create();
         }
 
-    Annotation_Sequence ( int X, int Y, int W, int H ) : Sequence ( 0 )
-        {
-        }
+/*     Annotation_Sequence ( int X, int Y, int W, int H ) : Sequence ( 0 ) */
+/*         { */
+/*         } */
 
     ~Annotation_Sequence ( )
         {
diff --git a/Timeline/Disk_Stream.C b/Timeline/Disk_Stream.C
index e694947..57b389b 100644
--- a/Timeline/Disk_Stream.C
+++ b/Timeline/Disk_Stream.C
@@ -165,7 +165,7 @@ void
 Disk_Stream::run ( void )
 {
     if ( pthread_create( &_thread, NULL, &Disk_Stream::disk_thread, this ) != 0 )
-        /* error */;
+        FATAL( "Could not create IO thread!" );
 }
 
 /* to be called when the JACK buffer size changes. */
diff --git a/Timeline/Engine.C b/Timeline/Engine.C
index 70d7e21..84131fc 100644
--- a/Timeline/Engine.C
+++ b/Timeline/Engine.C
@@ -150,7 +150,7 @@ Engine::sync ( jack_transport_state_t state, jack_position_t *pos )
 
 /* THREAD: RT */
 void
-Engine::timebase ( jack_transport_state_t state, jack_nframes_t nframes, jack_position_t *pos, int new_pos )
+Engine::timebase ( jack_transport_state_t, jack_nframes_t, jack_position_t *pos, int )
 {
     position_info pi = timeline->solve_tempomap( pos->frame );
 
diff --git a/Timeline/Loggable.H b/Timeline/Loggable.H
index e760f13..9e6b7af 100644
--- a/Timeline/Loggable.H
+++ b/Timeline/Loggable.H
@@ -234,7 +234,7 @@ protected:
     void log_destroy ( void ) const;
 
     /* leaf subclasses *must* call log_create() at the end of their copy contructors */
-    Loggable ( const Loggable &rhs )
+    Loggable ( const Loggable & )
         {
             init( true );
             /* FIXME: get a real id here!!! */
diff --git a/Timeline/Peaks.C b/Timeline/Peaks.C
index 30b5b20..eaba682 100644
--- a/Timeline/Peaks.C
+++ b/Timeline/Peaks.C
@@ -84,29 +84,6 @@ touch ( int fd )
     fchmod( fd, st.st_mode );
 }
 
-
-static int
-nearest_power_of_two ( int v )
-{
-    int p = 1;
-    while ( 1 << p < v )
-        ++p;
-
-    return 1 << p;
-}
-
-static nframes_t
-nearest_cached_chunksize ( nframes_t chunksize )
-{
-    nframes_t r = nearest_power_of_two( chunksize );
-
-    for ( int i = Peaks::cache_levels; i--; r >>= Peaks::cache_step )
-        if ( chunksize >= r )
-            return r;
-
-    return 0;
-}
-
 
 
 Peaks::Peaks ( Audio_File *c )
@@ -128,7 +105,7 @@ Peaks::fill_buffer ( float fpp, nframes_t s, nframes_t e ) const
 {
     _fpp = fpp;
 
-    return read_peaks( s, e, (e - s) / fpp, fpp );
+    return read_peaks( s, (e - s) / fpp, fpp );
 }
 
 struct peakfile_block_header
@@ -297,6 +274,8 @@ public:
             scan( chunksize );
 
             assert( _chunksize );
+
+            return true;
         }
 
     void
@@ -337,7 +316,8 @@ public:
 
             nframes_t len = 0;
 
-            nframes_t i;
+            int i;
+
             for ( i = 0; i < npeaks; ++i )
             {
                 /* read in a buffer */
@@ -389,9 +369,6 @@ Peaks::ready ( nframes_t s, int npeaks, nframes_t chunksize ) const
 int
 Peaks::read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const
 {
-
-    nframes_t ncc = nearest_cached_chunksize( chunksize );
-
     /* never try to build peaks while recording */
     if ( ! transport->recording )
     {
@@ -408,19 +385,7 @@ Peaks::read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chu
     if ( ! _peakfile.open( _clip->name(),  _clip->channels(), chunksize ) )
         return 0;
 
-/*     else if ( ! _peakfile.contains( s, npeaks ) ) */
-/*     { */
-/*         /\* the best peakfile for this chunksize doesn't have the */
-/*          * peaks we need. Perhaps it's still being constructed, */
-/*          * try the next best, then give up. *\/ */
-/*         if ( ! _peakfile.open( _clip->name(), chunksize >> 1, _clip->channels() ) ) */
-/*             return 0; */
-/*     } */
-
     return _peakfile.read_peaks( peaks, s, npeaks, chunksize );
-
-    // _peakfile.close();
-
 }
 
 
@@ -479,7 +444,7 @@ Peaks::read_source_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunk
 }
 
 int
-Peaks::read_peaks ( nframes_t s, nframes_t e, int npeaks, nframes_t chunksize ) const
+Peaks::read_peaks ( nframes_t s, int npeaks, nframes_t chunksize ) const
 {
 //    printf( "reading peaks %d @ %d\n", npeaks, chunksize );
 
@@ -494,7 +459,7 @@ Peaks::read_peaks ( nframes_t s, nframes_t e, int npeaks, nframes_t chunksize )
     _peakbuf.buf->chunksize = chunksize;
 
     /* FIXME: use actual minimum chunksize from peakfile! */
-    if ( chunksize < cache_minimum )
+    if ( chunksize < (nframes_t)cache_minimum )
         _peakbuf.len = read_source_peaks( _peakbuf.buf->data, s, npeaks, chunksize );
     else
         _peakbuf.len = read_peakfile_peaks( _peakbuf.buf->data, s, npeaks, chunksize );
diff --git a/Timeline/Peaks.H b/Timeline/Peaks.H
index 7d0c70b..1f9533a 100644
--- a/Timeline/Peaks.H
+++ b/Timeline/Peaks.H
@@ -101,7 +101,7 @@ class Peaks
 
     mutable float _fpp;
 
-    int read_peaks ( nframes_t s, nframes_t e, int npeaks, nframes_t chunksize ) const;
+    int read_peaks ( nframes_t s, int npeaks, nframes_t chunksize ) const;
     int read_source_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const;
     int read_source_peaks ( Peak *peaks, int npeaks, nframes_t chunksize ) const;
     int read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const;
diff --git a/Timeline/Playback_DS.C b/Timeline/Playback_DS.C
index b9c4115..6f22a56 100644
--- a/Timeline/Playback_DS.C
+++ b/Timeline/Playback_DS.C
@@ -82,7 +82,7 @@ Playback_DS::read_block ( sample_t *buf, nframes_t nframes )
     if ( sequence()->play( buf, _frame, nframes, channels() ) )
         _frame += nframes;
     else
-        /* error */;
+        WARNING( "Programming error?" );
 
     timeline->unlock();
 }
diff --git a/Timeline/Sequence.C b/Timeline/Sequence.C
index ced8ac7..845d538 100644
--- a/Timeline/Sequence.C
+++ b/Timeline/Sequence.C
@@ -223,7 +223,7 @@ void
 Sequence::snap ( Sequence_Widget *r )
 {
     const int snap_pixels = 10;
-    const int snap_frames = timeline->x_to_ts( snap_pixels );
+    const nframes_t snap_frames = timeline->x_to_ts( snap_pixels );
 
     /* snap to other widgets */
     if ( Timeline::snap_magnetic )
diff --git a/Timeline/Sequence.H b/Timeline/Sequence.H
index e5ef9ef..45b7439 100644
--- a/Timeline/Sequence.H
+++ b/Timeline/Sequence.H
@@ -118,6 +118,6 @@ public:
     virtual int handle ( int m );
     virtual void draw ( void );
 
-    virtual nframes_t process ( nframes_t nframes ) { return 0; }
+    virtual nframes_t process ( nframes_t ) { return 0; }
 
 };
diff --git a/Timeline/Sequence_Widget.C b/Timeline/Sequence_Widget.C
index 4575fe7..128729c 100644
--- a/Timeline/Sequence_Widget.C
+++ b/Timeline/Sequence_Widget.C
@@ -106,7 +106,7 @@ Sequence_Widget::start ( nframes_t where )
 
             d = 0 - d;
 
-            if ( m <= d )
+            if ( m <= (nframes_t)d )
                 d = m;
 
             for ( list <Sequence_Widget *>::iterator i = _selection.begin(); i != _selection.end(); ++i )
diff --git a/Timeline/Tempo_Point.C b/Timeline/Tempo_Point.C
index b8df1b8..0508b54 100644
--- a/Timeline/Tempo_Point.C
+++ b/Timeline/Tempo_Point.C
@@ -156,7 +156,7 @@ public:
         }
 
     static void
-    enter_cb ( Fl_Widget *w, void *v )
+    enter_cb ( Fl_Widget *, void *v )
         {
             ((Tempo_Point_Editor*)v)->enter_cb();
         }
diff --git a/Timeline/Tempo_Sequence.H b/Timeline/Tempo_Sequence.H
index 38a12a0..9a32c1a 100644
--- a/Timeline/Tempo_Sequence.H
+++ b/Timeline/Tempo_Sequence.H
@@ -28,8 +28,8 @@ class Tempo_Sequence : public Sequence
 protected:
 
     /* not used */
-    void get ( Log_Entry &e ) const { }
-    void set ( Log_Entry &e ) { }
+    void get ( Log_Entry & ) const { }
+    void set ( Log_Entry & ) { }
 
 public:
 
diff --git a/Timeline/Time_Point.C b/Timeline/Time_Point.C
index ceddea3..fb23623 100644
--- a/Timeline/Time_Point.C
+++ b/Timeline/Time_Point.C
@@ -185,7 +185,7 @@ public:
         }
 
     static void
-    enter_cb ( Fl_Widget *w, void *v )
+    enter_cb ( Fl_Widget *, void *v )
         {
             ((Time_Point_Editor*)v)->enter_cb();
         }
diff --git a/Timeline/Time_Sequence.H b/Timeline/Time_Sequence.H
index 3b0a5e0..b5f3f54 100644
--- a/Timeline/Time_Sequence.H
+++ b/Timeline/Time_Sequence.H
@@ -31,8 +31,8 @@ class Time_Sequence : public Sequence
 protected:
 
     /* not used */
-    void get ( Log_Entry &e ) const { }
-    void set ( Log_Entry &e ) { }
+    void get ( Log_Entry & ) const { }
+    void set ( Log_Entry & ) { }
 
 public:
 
diff --git a/Timeline/Timeline.C b/Timeline/Timeline.C
index 6ee19fb..c19cec5 100644
--- a/Timeline/Timeline.C
+++ b/Timeline/Timeline.C
@@ -233,21 +233,22 @@ Timeline::Timeline ( int X, int Y, int W, int H, const char* L ) : Fl_Overlay_Wi
 }
 
 
-float
-Timeline::beats_per_minute ( nframes_t when ) const
-{
 
-/*     return tempo_track->beats_per_minute( when ); */
+/* float */
+/* Timeline::beats_per_minute ( nframes_t when ) const */
+/* { */
 
-}
+/* /\*     return tempo_track->beats_per_minute( when ); *\/ */
 
-int
-Timeline::beats_per_bar ( nframes_t when ) const
-{
-    time_sig t = time_track->time( when );
+/* } */
 
-    return t.beats_per_bar;
-}
+/* int */
+/* Timeline::beats_per_bar ( nframes_t when ) const */
+/* { */
+/*     time_sig t = time_track->time( when ); */
+
+/*     return t.beats_per_bar; */
+/* } */
 
 void
 Timeline::beats_per_minute ( nframes_t when, float bpm )
@@ -502,12 +503,12 @@ Timeline::draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color )
 
 }
 
-/** just like draw mesure lines except that it also draws the BBT values.  */
-void
-Timeline::draw_measure_BBT ( int X, int Y, int W, int H, Fl_Color color )
-{
-//    render_tempomap( X, Y, W, H, color, true );
-}
+/* /\** just like draw mesure lines except that it also draws the BBT values.  *\/ */
+/* void */
+/* Timeline::draw_measure_BBT ( int X, int Y, int W, int H, Fl_Color color ) */
+/* { */
+/* //    render_tempomap( X, Y, W, H, color, true ); */
+/* } */
 
 void
 Timeline::xposition ( int X )
diff --git a/Timeline/Track.C b/Timeline/Track.C
index 1622fee..a6237bd 100644
--- a/Timeline/Track.C
+++ b/Timeline/Track.C
@@ -41,7 +41,7 @@ int Track::_soloing = 0;
 const char *Track::capture_format = "Wav 24";
 
 void
-Track::cb_input_field ( Fl_Widget *w, void *v )
+Track::cb_input_field ( Fl_Widget *, void *v )
 {
     ((Track*)v)->cb_input_field();
 }