diff --git a/Timeline/Audio_File_SF.C b/Timeline/Audio_File_SF.C
index 6839bf4..be3aec5 100644
--- a/Timeline/Audio_File_SF.C
+++ b/Timeline/Audio_File_SF.C
@@ -31,6 +31,8 @@
 
 // #define HAS_SF_FORMAT_VORBIS
 
+#include "debug.h"
+
 const Audio_File::format_desc Audio_File_SF::supported_formats[] =
 {
     {      "Wav 24",       "wav",   SF_FORMAT_WAV    | SF_FORMAT_PCM_24    | SF_ENDIAN_FILE },
@@ -178,7 +180,7 @@ nframes_t
 Audio_File_SF::read ( sample_t *buf, int channel, nframes_t len )
 {
     if ( len > 256 * 100 )
-        printf( "warning: attempt to read an insane number of frames (%lu) from soundfile\n", len );
+        WARNING( "warning: attempt to read an insane number of frames (%lu) from soundfile\n", (unsigned long)len );
 
 //    printf( "len = %lu, channels = %d\n", len, _channels );
 
@@ -193,7 +195,7 @@ Audio_File_SF::read ( sample_t *buf, int channel, nframes_t len )
         rlen = sf_readf_float( _in, tmp, len );
 
         /* extract the requested channel */
-        for ( int i = channel; i < rlen * _channels; i += _channels )
+        for ( unsigned int i = channel; i < rlen * _channels; i += _channels )
             *(buf++) = tmp[ i ];
 
         delete[] tmp;
diff --git a/Timeline/Fl_Menu_Settings.C b/Timeline/Fl_Menu_Settings.C
index 48ca5ed..a2f513e 100644
--- a/Timeline/Fl_Menu_Settings.C
+++ b/Timeline/Fl_Menu_Settings.C
@@ -55,9 +55,11 @@ Fl_Menu_Settings::indent ( FILE *fp, int n )
 int
 Fl_Menu_Settings::item_pathname_x ( char *path, int n, const Fl_Menu_Item *item )
 {
-    Fl_Menu_::item_pathname( path, n, item );
+    int r = Fl_Menu_::item_pathname( path, n, item );
 
     remove_ampersands( path, n );
+
+    return r;
 }
 
 /** dump options from submenu /menu/ of menubar /bar/ to file /fp/ */
@@ -331,4 +333,6 @@ Fl_Menu_Settings::load ( const Fl_Menu_Item *item, const char *name )
     load( this, item, fp, 0, path, sizeof( path ) );
 
     fclose( fp );
+
+    return true;
 }
diff --git a/Timeline/Peaks.C b/Timeline/Peaks.C
index 31ffddd..12947d1 100644
--- a/Timeline/Peaks.C
+++ b/Timeline/Peaks.C
@@ -99,7 +99,7 @@ Peaks::read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, int chunksize
     }
 
     int channels = _clip->channels();
-    const int ratio = chunksize / pfchunksize;
+    const unsigned int ratio = chunksize / pfchunksize;
 
     /* locate to start position */
     if ( fseek( fp, (s * channels / pfchunksize) * sizeof( Peak ), SEEK_CUR ) )
@@ -181,7 +181,7 @@ Peaks::read_source_peaks ( Peak *peaks, int npeaks, int chunksize ) const
             p.min = 0;
             p.max = 0;
 
-            for ( int k = j; k < len * channels; k += channels )
+            for ( nframes_t k = j; k < len * channels; k += channels )
             {
                 if ( fbuf[ k ] > p.max )
                     p.max = fbuf[ k ];
@@ -191,7 +191,7 @@ Peaks::read_source_peaks ( Peak *peaks, int npeaks, int chunksize ) const
 
         }
 
-        if ( len < chunksize )
+        if ( len < (nframes_t)chunksize )
             break;
     }
 
@@ -218,7 +218,7 @@ Peaks::read_peaks ( nframes_t s, nframes_t e, int npeaks, int chunksize ) const
 {
     printf( "reading peaks %d @ %d\n", npeaks, chunksize );
 
-    if ( _peakbuf.size < npeaks * _clip->channels() )
+    if ( _peakbuf.size < (nframes_t)( npeaks * _clip->channels() ) )
     {
         _peakbuf.size = npeaks * _clip->channels();
 //        printf( "reallocating peak buffer %li\n", _peakbuf.size );
diff --git a/Timeline/Project.C b/Timeline/Project.C
index 04f3bd4..2449426 100644
--- a/Timeline/Project.C
+++ b/Timeline/Project.C
@@ -72,6 +72,8 @@ Project::close ( void )
     write_info();
 
     _is_open = false;
+
+    return true;
 }
 
 bool
@@ -92,7 +94,7 @@ Project::write_info ( void )
     fprintf( fp, "created by\n\t%s\nversion\n\t%s\nsample rate\n\t%lu\n",
              APP_TITLE " " VERSION,
              PROJECT_VERSION,
-             timeline->sample_rate() );
+             (unsigned long)timeline->sample_rate() );
 
     fclose( fp );
 
diff --git a/Timeline/Sequence_Region.C b/Timeline/Sequence_Region.C
index b6abdc8..339c9c6 100644
--- a/Timeline/Sequence_Region.C
+++ b/Timeline/Sequence_Region.C
@@ -82,10 +82,10 @@ Sequence_Region::trim ( enum trim_e t, int X )
 
             long td = timeline->x_to_ts( d );
 
-            if ( td < 0 && _r->offset < 0 - td )
+            if ( td < 0 && _r->offset < (nframes_t)( 0 - td ) )
                 td = 0 - _r->offset;
 
-            if ( td > 0 && td >= _r->length )
+            if ( td > 0 && (nframes_t)td >= _r->length )
                 td = _r->length - timeline->x_to_ts( 1 );
 
 //                td = _r->length - timeline->x_to_ts( 1 );
@@ -105,7 +105,7 @@ Sequence_Region::trim ( enum trim_e t, int X )
 
 //            printf( "%li %li\n", td, _r->length - _r->offset );
 
-            if ( td >= 0 && _r->length < td )
+            if ( td >= 0 && _r->length < (nframes_t)td )
                 _r->length = timeline->x_to_ts( 1 );
             else
                 _r->length -= td;
diff --git a/Timeline/Track.C b/Timeline/Track.C
index 28fad99..94c0284 100644
--- a/Timeline/Track.C
+++ b/Timeline/Track.C
@@ -591,13 +591,13 @@ Track::handle ( int m )
 void
 Track::update_port_names ( void )
 {
-    for ( int i = 0; i < output.size(); ++i )
+    for ( unsigned int i = 0; i < output.size(); ++i )
         output[ i ].name( name(), i );
 
-    for ( int i = 0; i < input.size(); ++i )
+    for ( unsigned int i = 0; i < input.size(); ++i )
         input[ i ].name( name(), i );
 
-    for ( int i = 0; i < control_out.size(); ++i )
+    for ( unsigned int i = 0; i < control_out.size(); ++i )
         control_out[ i ]->name( name(), i, "cv" );