rtbuf/rtbuf

diff --git a/cli/rtbuf_cli.c b/cli/rtbuf_cli.c
index c253862..e8212c0 100644
--- a/cli/rtbuf_cli.c
+++ b/cli/rtbuf_cli.c
@@ -232,7 +232,7 @@ void * rtbuf_cli_run_thread_proc (void *arg)
   return 0;
 }
 
-int rtbuf_cli_start ()
+int rtbuf_cli_start (void)
 {
   if (!g_rtbuf_run && g_rtbuf_cli_run_thread) {
     if (pthread_join(g_rtbuf_cli_run_thread, 0))
@@ -255,7 +255,7 @@ int rtbuf_cli_start_ (int argc, const char *argv[])
   return rtbuf_cli_start();
 }
 
-int rtbuf_cli_stop ()
+int rtbuf_cli_stop (void)
 {
   if (g_rtbuf_run)
     g_rtbuf_run = 0;
@@ -355,7 +355,7 @@ void debug_read (int argc, const char **argv, f_cli f)
   }
 }
 
-void repl_init ()
+void repl_init (void)
 {
   cli_init(&g_cli);
   cli_prompt(&g_cli, "rtbuf> ");
@@ -374,7 +374,7 @@ int load (const char *path)
   return 0;
 }
 
-int repl ()
+int repl (void)
 {
   while (cli_read(&g_cli) >= 0) {
     /* debug_read(cli.argc, cli.argv, cli.f); */
@@ -383,7 +383,7 @@ int repl ()
   return 0;
 }
 
-int rtbuf_cli_do_event ()
+int rtbuf_cli_do_event (void)
 {
   if (cli_read_nonblocking(&g_cli) >= 0) {
     /* debug_read(cli.argc, cli.argv, cli.f); */
diff --git a/cli/rtbuf_cli.h b/cli/rtbuf_cli.h
index f5a57f7..6021ebc 100644
--- a/cli/rtbuf_cli.h
+++ b/cli/rtbuf_cli.h
@@ -22,14 +22,14 @@ extern f_rtbuf_position g_rtbuf_position_cb;
 extern pthread_t g_rtbuf_cli_run_thread;
 
 int rtbuf_cli_exit (int argc, const char *argv[]);
-void repl_init ();
+void repl_init (void);
 int load (const char *path);
-int repl ();
+int repl (void);
 void rtbuf_cli_args (int argc, char *argv[]);
 
-int rtbuf_cli_start ();
-int rtbuf_cli_stop ();
+int rtbuf_cli_start (void);
+int rtbuf_cli_stop (void);
 
-int rtbuf_cli_do_event ();
+int rtbuf_cli_do_event (void);
 
 #endif /* RTBUF_CLI_H */
diff --git a/gtk3/queue.c b/gtk3/queue.c
index 2830aa7..3aba9fa 100644
--- a/gtk3/queue.c
+++ b/gtk3/queue.c
@@ -32,7 +32,7 @@ void queue_destroy (s_queue *q)
   q->length = 0;
 }
 
-s_queue * queue_new ()
+s_queue * queue_new (void)
 {
   s_queue *q = malloc(sizeof(s_queue));
   if (q)
diff --git a/gtk3/queue.h b/gtk3/queue.h
index 10e5a01..a911547 100644
--- a/gtk3/queue.h
+++ b/gtk3/queue.h
@@ -26,7 +26,7 @@ struct queue {
 
 void      queue_init (s_queue *q);
 void      queue_destroy (s_queue *q);
-s_queue * queue_new ();
+s_queue * queue_new (void);
 void      queue_delete (s_queue *q);
 void      queue_enqueue (s_queue *q, void *item);
 void *    queue_dequeue (s_queue *q);
diff --git a/gtk3/rtbuf_gtk3.c b/gtk3/rtbuf_gtk3.c
index f010d16..771f842 100644
--- a/gtk3/rtbuf_gtk3.c
+++ b/gtk3/rtbuf_gtk3.c
@@ -178,7 +178,7 @@ void rtbuf_gtk_destroy (GtkWidget *widget, gpointer data)
   gtk_widget_destroy(widget);
 }
 
-void rtbuf_gtk_library_menu ()
+void rtbuf_gtk_library_menu (void)
 {
   if (!library_menu)
     library_menu = GTK_MENU(gtk_builder_get_object(builder,
@@ -393,7 +393,7 @@ void rtbuf_gtk_modular_stop (GtkWidget *widget, gpointer data)
   rtbuf_cli_stop();
 }
 
-void rtbuf_gtk_modular_toolbar ()
+void rtbuf_gtk_modular_toolbar (void)
 {
   GtkWidget *image;
   GtkToolItem *item;
@@ -417,7 +417,7 @@ void rtbuf_gtk_modular_toolbar ()
   gtk_toolbar_insert(modular_toolbar, item, -1);
 }
 
-void rtbuf_gtk_modular ()
+void rtbuf_gtk_modular (void)
 {
   GObject *button;
 
@@ -446,10 +446,10 @@ void rtbuf_gtk_modular ()
                    G_CALLBACK(rtbuf_gtk_modular_motion), NULL);
 }
 
-int rtbuf_gtk_builder ()
+int rtbuf_gtk_builder (void)
 {
   GError *error = NULL;
-  builder = gtk_builder_new ();
+  builder = gtk_builder_new();
   if (gtk_builder_add_from_resource(builder, "/rtbuf/rtbuf_gtk3_modular.ui",
                                     &error) == 0) {
     g_printerr("Error loading resource /rtbuf/rtbuf_gtk3_modular.ui: %s\n",
@@ -460,13 +460,13 @@ int rtbuf_gtk_builder ()
   return 0;
 }
 
-void rtbuf_gtk_lock ()
+void rtbuf_gtk_lock (void)
 {
   if (pthread_equal(pthread_self(), g_rtbuf_cli_run_thread))
     g_mutex_lock(&g_mutex);
 }
 
-void rtbuf_gtk_unlock ()
+void rtbuf_gtk_unlock (void)
 {
   if (pthread_equal(pthread_self(), g_rtbuf_cli_run_thread))
     g_mutex_unlock(&g_mutex);
diff --git a/gtk3/rtbuf_gtk3_connection.c b/gtk3/rtbuf_gtk3_connection.c
index 96dbd09..4f087d5 100644
--- a/gtk3/rtbuf_gtk3_connection.c
+++ b/gtk3/rtbuf_gtk3_connection.c
@@ -21,14 +21,14 @@ s_data_type g_rtbuf_gtk_connection_type = {
 };
 s_data_alloc g_rtbuf_gtk_connection_alloc;
 
-void rtbuf_gtk_connection_init ()
+void rtbuf_gtk_connection_init (void)
 {
   data_alloc_init(&g_rtbuf_gtk_connection_alloc,
                   &g_rtbuf_gtk_connection_type,
                   RTBUF_MAX * 10, NULL, NULL);
 }
 
-s_rtbuf_gtk_connection * rtbuf_gtk_connection_new ()
+s_rtbuf_gtk_connection * rtbuf_gtk_connection_new (void)
 {
   s_rtbuf_gtk_connection *connection = data_new(&g_rtbuf_gtk_connection_alloc);
   return connection;
diff --git a/gtk3/rtbuf_gtk3_connection.h b/gtk3/rtbuf_gtk3_connection.h
index cac9abd..85fe7d7 100644
--- a/gtk3/rtbuf_gtk3_connection.h
+++ b/gtk3/rtbuf_gtk3_connection.h
@@ -25,8 +25,8 @@ struct rtbuf_gtk_connection {
   s_rtbuf_gtk_connection *next;
 };
 
-void rtbuf_gtk_connection_init ();
-s_rtbuf_gtk_connection * rtbuf_gtk_connection_new ();
+void rtbuf_gtk_connection_init (void);
+s_rtbuf_gtk_connection * rtbuf_gtk_connection_new (void);
 void rtbuf_gtk_connection_delete (s_rtbuf_gtk_connection *connection);
 
 void rtbuf_gtk_connection_push (s_rtbuf_gtk_connection **head,
diff --git a/gtk3/rtbuf_gtk3_library.c b/gtk3/rtbuf_gtk3_library.c
index 193c81e..3424817 100644
--- a/gtk3/rtbuf_gtk3_library.c
+++ b/gtk3/rtbuf_gtk3_library.c
@@ -189,7 +189,7 @@ void rtbuf_gtk_library_load_directory (const char *path, size_t prefix_len)
   }
 }
 
-void rtbuf_gtk_library_load ()
+void rtbuf_gtk_library_load (void)
 {
   char **path = g_rtbuf_lib_path;
   if (g_rtbuf_gtk_library_tree) {
diff --git a/gtk3/rtbuf_gtk3_library.h b/gtk3/rtbuf_gtk3_library.h
index d00c504..021a27f 100644
--- a/gtk3/rtbuf_gtk3_library.h
+++ b/gtk3/rtbuf_gtk3_library.h
@@ -28,6 +28,6 @@ struct rtbuf_gtk_library_tree {
 
 extern s_rtbuf_gtk_library_tree *g_rtbuf_gtk_library_tree;
 
-void rtbuf_gtk_library_load ();
+void rtbuf_gtk_library_load (void);
 
 #endif /* RTBUF_GTK_LIBRARY_H */
diff --git a/gtk3/rtbuf_gtk3_rtbuf_info.c b/gtk3/rtbuf_gtk3_rtbuf_info.c
index 78d013c..47f7433 100644
--- a/gtk3/rtbuf_gtk3_rtbuf_info.c
+++ b/gtk3/rtbuf_gtk3_rtbuf_info.c
@@ -22,14 +22,14 @@ s_data_type  g_rtbuf_gtk_rtbuf_info_type = {
 
 s_data_alloc g_rtbuf_gtk_rtbuf_info_alloc;
 
-void rtbuf_gtk_rtbuf_info_init ()
+void rtbuf_gtk_rtbuf_info_init (void)
 {
   data_alloc_init(&g_rtbuf_gtk_rtbuf_info_alloc,
                   &g_rtbuf_gtk_rtbuf_info_type,
                   RTBUF_MAX, 0, 0);
 }
 
-s_rtbuf_gtk_rtbuf_info *rtbuf_gtk_rtbuf_info_new ()
+s_rtbuf_gtk_rtbuf_info *rtbuf_gtk_rtbuf_info_new (void)
 {
   s_rtbuf_gtk_rtbuf_info *info =
     data_new(&g_rtbuf_gtk_rtbuf_info_alloc);
diff --git a/gtk3/rtbuf_gtk3_rtbuf_info.h b/gtk3/rtbuf_gtk3_rtbuf_info.h
index e026ded..a07f3d5 100644
--- a/gtk3/rtbuf_gtk3_rtbuf_info.h
+++ b/gtk3/rtbuf_gtk3_rtbuf_info.h
@@ -26,8 +26,8 @@ typedef struct rtbuf_gtk_rtbuf_info {
   RtbufOutputWidget *out[RTBUF_PROC_OUT_MAX];
 } s_rtbuf_gtk_rtbuf_info;
 
-void rtbuf_gtk_rtbuf_info_init ();
-s_rtbuf_gtk_rtbuf_info *rtbuf_gtk_rtbuf_info_new ();
+void rtbuf_gtk_rtbuf_info_init (void);
+s_rtbuf_gtk_rtbuf_info *rtbuf_gtk_rtbuf_info_new (void);
 void rtbuf_gtk_rtbuf_info_delete (s_rtbuf_gtk_rtbuf_info *info);
 
 #endif /* RTBUF_GTK_RTBUF_INFO_H */
diff --git a/lib/music.c b/lib/music.c
index 57f34c5..403b4e3 100644
--- a/lib/music.c
+++ b/lib/music.c
@@ -20,7 +20,7 @@
 int    g_rtbuf_music_init = 0;
 double g_rtbuf_music_tune = 0.0;
 
-int rtbuf_music_init ()
+int rtbuf_music_init (void)
 {
   double tune_c;
   if (g_rtbuf_music_init)
diff --git a/lib/music.h b/lib/music.h
index 7b59a7e..7399ce4 100644
--- a/lib/music.h
+++ b/lib/music.h
@@ -73,7 +73,7 @@ typedef struct rtbuf_music_notes {
 #define RTBUF_MUSIC_NOTES_SIZE sizeof(unsigned int)
 #define RTBUF_MUSIC_NOTES_TYPE "music_notes"
 
-int  rtbuf_music_init ();
+int  rtbuf_music_init (void);
 void rtbuf_music_notes_init (s_rtbuf_music_notes *notes);
 int  rtbuf_music_notes_new (s_rtbuf_music_notes *notes, double velocity);
 void rtbuf_music_notes_delete (s_rtbuf_music_notes *notes,
diff --git a/lib/music_type.c b/lib/music_type.c
index 1666c5e..a45cb35 100644
--- a/lib/music_type.c
+++ b/lib/music_type.c
@@ -15,7 +15,7 @@
 #include "../librtbuf/rtbuf.h"
 #include "music.h"
 
-void notes_in ()
+void notes_in (void)
 {
   unsigned int i = 0;
   const char *st = "RTBUF_SIGNAL_SAMPLE_TYPE";
@@ -50,7 +50,7 @@ void notes_in ()
   }
 }
 
-void notes_out ()
+void notes_out (void)
 {
   unsigned int i = 0;
   const char *st = "RTBUF_SIGNAL_SAMPLE_TYPE";
@@ -70,7 +70,7 @@ void notes_out ()
   }
 }
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_music_type */\n");
   printf("#ifndef RTBUF_MUSIC_TYPE_H\n"
diff --git a/lib/portaudio/config.c b/lib/portaudio/config.c
index 6b2b48e..a57f3ea 100644
--- a/lib/portaudio/config.c
+++ b/lib/portaudio/config.c
@@ -13,7 +13,7 @@
  */
 #include <portaudio.h>
 
-int main ()
+int main (void)
 {
   return 0;
 }
diff --git a/lib/portaudio_type.c b/lib/portaudio_type.c
index 0a6e41e..0741069 100644
--- a/lib/portaudio_type.c
+++ b/lib/portaudio_type.c
@@ -15,7 +15,7 @@
 #include "../librtbuf/rtbuf.h"
 #include "portaudio.h"
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_portaudio_type */\n");
   printf("#ifndef RTBUF_PORTAUDIO_TYPE_H\n"
diff --git a/lib/reverb_type.c b/lib/reverb_type.c
index 0804c41..8f96a48 100644
--- a/lib/reverb_type.c
+++ b/lib/reverb_type.c
@@ -15,7 +15,7 @@
 #include "../librtbuf/rtbuf.h"
 #include "reverb.h"
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_reverb_type */\n");
   printf("#ifndef RTBUF_REVERB_TYPE_H\n"
diff --git a/lib/signal_type.c b/lib/signal_type.c
index 14c5f6a..f218c5a 100644
--- a/lib/signal_type.c
+++ b/lib/signal_type.c
@@ -15,7 +15,7 @@
 #include "../librtbuf/rtbuf.h"
 #include "signal.h"
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_signal_type */\n");
   printf("#ifndef RTBUF_SIGNAL_TYPE_H\n"
diff --git a/lib/sndio/check_sndio.c b/lib/sndio/check_sndio.c
index 3b13449..cbc5e92 100644
--- a/lib/sndio/check_sndio.c
+++ b/lib/sndio/check_sndio.c
@@ -13,7 +13,7 @@
  */
 #include <sndio.h>
 
-int main ()
+int main (void)
 {
   struct sio_hdl *sio_hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0);
   sio_close(sio_hdl);
diff --git a/lib/sndio/config.c b/lib/sndio/config.c
index 8a3e3af..4c761de 100644
--- a/lib/sndio/config.c
+++ b/lib/sndio/config.c
@@ -13,7 +13,7 @@
  */
 #include <sndio.h>
 
-int main ()
+int main (void)
 {
   return 0;
 }
diff --git a/lib/sndio_type.c b/lib/sndio_type.c
index 2a179ee..5d5e6b3 100644
--- a/lib/sndio_type.c
+++ b/lib/sndio_type.c
@@ -15,7 +15,7 @@
 #include "../librtbuf/rtbuf.h"
 #include "sndio.h"
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_sndio_type */\n");
   printf("#ifndef RTBUF_SNDIO_TYPE_H\n"
diff --git a/lib/synth_type.c b/lib/synth_type.c
index 3676d9c..713c78e 100644
--- a/lib/synth_type.c
+++ b/lib/synth_type.c
@@ -16,7 +16,7 @@
 #include "music.h"
 #include "music_type.h"
 
-void notes_in ()
+void notes_in (void)
 {
   unsigned int i = 0;
   const char *st = "RTBUF_SIGNAL_TYPE";
@@ -43,7 +43,7 @@ void notes_in ()
   }
 }
 
-int main ()
+int main (void)
 {
   printf("/* file generated by rtbuf_synth_type */\n");
   printf("#ifndef RTBUF_SYNTH_TYPE_H\n"
diff --git a/librtbuf/data.c b/librtbuf/data.c
index a5b67fa..11ea609 100644
--- a/librtbuf/data.c
+++ b/librtbuf/data.c
@@ -30,7 +30,7 @@ s_data_type g_data_type_type = {
 s_data_alloc *g_data_type_alloc = NULL;
 u_data_type *g_data_type = NULL;
 
-int libdata_init ()
+int libdata_init (void)
 {
   data_alloc_init(&g_data_alloc_alloc, &g_data_alloc_type,
                   DATA_ALLOC_MAX, 0, (f_data_clean*) data_alloc_clean);
@@ -42,7 +42,7 @@ int libdata_init ()
   return 0;
 }
 
-void libdata_shutdown ()
+void libdata_shutdown (void)
 {
   if (g_data_alloc) {
     data_alloc_delete_all();
@@ -150,7 +150,7 @@ void data_alloc_delete (s_data_alloc *da)
   data_delete(&g_data_alloc_alloc, da);
 }
 
-void data_alloc_delete_all ()
+void data_alloc_delete_all (void)
 {
   unsigned i = 0;
   int n = g_data_alloc_alloc.n;
diff --git a/librtbuf/data.h b/librtbuf/data.h
index b2c08e9..0967c40 100644
--- a/librtbuf/data.h
+++ b/librtbuf/data.h
@@ -92,9 +92,9 @@ s_data_alloc * data_alloc_new (s_data_type *t,
                                unsigned int max, f_data_init *init,
                                f_data_clean *clean);
 void           data_alloc_delete (s_data_alloc *da);
-void           data_alloc_delete_all ();
+void           data_alloc_delete_all (void);
 
-int libdata_init ();
-void libdata_shutdown ();
+int libdata_init (void);
+void libdata_shutdown (void);
 
 #endif
diff --git a/librtbuf/lib.h b/librtbuf/lib.h
index d4bcf55..2418d0c 100644
--- a/librtbuf/lib.h
+++ b/librtbuf/lib.h
@@ -88,12 +88,12 @@ extern s_data_alloc g_rtbuf_lib_alloc;
 extern s_rtbuf_lib *g_rtbuf_lib;
 
 void          rtbuf_lib_delete (s_rtbuf_lib *rl);
-void          rtbuf_lib_delete_all ();
+void          rtbuf_lib_delete_all (void);
 int           rtbuf_lib_find (const char *str);
-void          rtbuf_lib_init_ ();
-void          rtbuf_lib_shutdown ();
+void          rtbuf_lib_init_ (void);
+void          rtbuf_lib_shutdown (void);
 s_rtbuf_lib * rtbuf_lib_load (const char *path);
-s_rtbuf_lib * rtbuf_lib_new ();
+s_rtbuf_lib * rtbuf_lib_new (void);
 void          rtbuf_lib_print (const s_rtbuf_lib *lib);
 void          rtbuf_lib_print_long (unsigned int i);
 
diff --git a/librtbuf/proc.h b/librtbuf/proc.h
index d9962da..702dc37 100644
--- a/librtbuf/proc.h
+++ b/librtbuf/proc.h
@@ -61,14 +61,14 @@ extern s_data_alloc  g_rtbuf_proc_alloc;
 extern s_rtbuf_proc *g_rtbuf_proc;
 
 void           rtbuf_proc_delete (s_rtbuf_proc *proc);
-void           rtbuf_proc_delete_all ();
+void           rtbuf_proc_delete_all (void);
 s_rtbuf_proc * rtbuf_proc_find (const char *x);
-void           rtbuf_proc_init ();
-s_rtbuf_proc * rtbuf_proc_new ();
+void           rtbuf_proc_init (void);
+s_rtbuf_proc * rtbuf_proc_new (void);
 int            rtbuf_proc_out_find (s_rtbuf_proc *proc,
                                     const char *name);
 int            rtbuf_proc_p (s_rtbuf_proc *proc);
 void           rtbuf_proc_print (s_rtbuf_proc *proc);
-void           rtbuf_proc_shutdown ();
+void           rtbuf_proc_shutdown (void);
 
 #endif
diff --git a/librtbuf/rtbuf.c b/librtbuf/rtbuf.c
index 402f907..5be276b 100644
--- a/librtbuf/rtbuf.c
+++ b/librtbuf/rtbuf.c
@@ -44,7 +44,7 @@ f_rtbuf_delete_cb g_rtbuf_delete_cb = 0;
 f_rtbuf_bind_cb   g_rtbuf_bind_cb = 0;
 f_rtbuf_unbind_cb g_rtbuf_unbind_cb = 0;
 
-int librtbuf_init ()
+int librtbuf_init (void)
 {
   libdata_init();
   bzero(g_rtbuf_sorted, sizeof(g_rtbuf_sorted));
@@ -58,7 +58,7 @@ int librtbuf_init ()
   return 0;
 }
 
-void librtbuf_shutdown ()
+void librtbuf_shutdown (void)
 {
   rtbuf_var_shutdown();
   rtbuf_lib_shutdown();
@@ -207,7 +207,7 @@ void rtbuf_unbind_all_out (s_rtbuf *rtb)
   assert(g_rtbuf <= rtb);
   assert(rtb < g_rtbuf + RTBUF_MAX);
   rtb_i = rtb - g_rtbuf;
-  while (i < g_rtbuf_alloc.n && rtb->refc) {
+  while (i < g_rtbuf_alloc.n && n && rtb->refc) {
     if (g_rtbuf[i].data) {
       rtbuf_unbind_all_out_rtbuf(rtb, rtb_i, &g_rtbuf[i]);
       n--;
@@ -357,17 +357,17 @@ void rtbuf_find_roots (s_rtbuf_in_stack *rvs)
   s_rtbuf *rtb = g_rtbuf;
   unsigned int i = 0;
   unsigned int n = g_rtbuf_alloc.n - g_rtbuf_alloc.free_n;
-  unsigned int c = 0;
-  /* printf("rtbuf_find_roots\n"); */
-  while (i < g_rtbuf_alloc.n && n > 0) {
-    /* printf(" rtbuf_find_roots %u %u\n", i, n); */
+  // unsigned int c = 0;
+  // printf("rtbuf_find_roots\n");
+  while (i < g_rtbuf_alloc.n && n) {
+    // printf(" rtbuf_find_roots %u %u\n", i, n);
     if (rtb->data) {
       if (rtb->flags & RTBUF_DELETE)
         rtbuf_delete_(rtb);
       else {
         if (rtb->refc == 0) {
           rtbuf_in_stack_push(rvs, i, 0);
-          c++;
+          // c++;
         }
       }
       n--;
@@ -375,7 +375,7 @@ void rtbuf_find_roots (s_rtbuf_in_stack *rvs)
     rtb++;
     i++;
   }
-  /* printf(" rtbuf_find_roots => %u\n", c); */
+  // printf(" rtbuf_find_roots => %u\n", c);
 }
 
 /* XXX needs rewrite */
@@ -406,7 +406,7 @@ void rtbuf_sort_push_child (s_rtbuf_in_stack *rvs,
 }
 
 /* XXX needs rewrite */
-void rtbuf_sort ()
+void rtbuf_sort (void)
 {
   s_rtbuf_in_stack rvs;
   s_rtbuf_in_ptr *ptr;
@@ -428,7 +428,7 @@ void rtbuf_sort ()
   rtbuf_print_sorted();
 }
 
-int rtbuf_start ()
+int rtbuf_start (void)
 {
   unsigned int i = 0;
   /* printf("rtbuf_start\n"); */
@@ -452,7 +452,7 @@ int rtbuf_start ()
   return 0;
 }
 
-int rtbuf_run ()
+int rtbuf_run (void)
 {
   unsigned int i = 0;
   /* printf("rtbuf_run\n"); */
@@ -484,7 +484,7 @@ int rtbuf_run ()
   return 0;
 }
 
-void rtbuf_stop ()
+void rtbuf_stop (void)
 {
   unsigned int i = 0;
   /* printf("rtbuf_stop\n"); */
@@ -635,7 +635,7 @@ void rtbuf_print_long (const s_rtbuf *rtbuf)
   fflush(stdout);
 }
 
-void rtbuf_print_sorted ()
+void rtbuf_print_sorted (void)
 {
   unsigned int i = 0;
   while (i < g_rtbuf_sorted_n) {
diff --git a/librtbuf/rtbuf.h b/librtbuf/rtbuf.h
index 6a00531..1f232d4 100644
--- a/librtbuf/rtbuf.h
+++ b/librtbuf/rtbuf.h
@@ -168,7 +168,7 @@ extern f_rtbuf_unbind_cb g_rtbuf_unbind_cb;
  *
  * @sa librtbuf_shutdown
  */
-int librtbuf_init ();
+int librtbuf_init (void);
 
 /**
  * @brief Shutdown librtbuf.
@@ -178,7 +178,7 @@ int librtbuf_init ();
  *
  * @sa librtbuf_init
  */
-void librtbuf_shutdown ();
+void librtbuf_shutdown (void);
 
 int rtbuf_err (const char *msg);
 
@@ -220,13 +220,13 @@ void  rtbuf_bind (unsigned int src, unsigned int out,
 int   rtbuf_out_find (s_rtbuf *rtb, symbol sym);
 int   rtbuf_data_set (s_rtbuf *rtb, symbol name, void *value,
                       unsigned int size);
-void  rtbuf_sort ();
-int   rtbuf_start ();
-int   rtbuf_run ();
-void  rtbuf_stop ();
+void  rtbuf_sort (void);
+int   rtbuf_start (void);
+int   rtbuf_run (void);
+void  rtbuf_stop (void);
 void  rtbuf_print (const s_rtbuf *rtbuf);
 void  rtbuf_print_long (const s_rtbuf *rtbuf);
-void  rtbuf_print_sorted ();
+void  rtbuf_print_sorted (void);
 
 int  rtbuf_out_int (s_rtbuf *rtb, unsigned int out, int default_value);
 
diff --git a/librtbuf/rtbuf_lib.c b/librtbuf/rtbuf_lib.c
index 9e56aa1..3f7ad1c 100644
--- a/librtbuf/rtbuf_lib.c
+++ b/librtbuf/rtbuf_lib.c
@@ -35,7 +35,7 @@ char *g_rtbuf_lib_path[] = { "./lib/",
                              RTBUF_LIBDIR "/",
                              0 };
 
-void rtbuf_lib_init_ ()
+void rtbuf_lib_init_ (void)
 {
   char *in = getenv("HOME");
   char *out = g_rtbuf_lib_user_dir;
@@ -53,7 +53,7 @@ void rtbuf_lib_init_ ()
   *out = 0;
 }
 
-void rtbuf_lib_shutdown ()
+void rtbuf_lib_shutdown (void)
 {
   if (g_rtbuf_lib) {
     rtbuf_lib_delete_all();
@@ -91,7 +91,7 @@ int rtbuf_lib_find (const char *str)
   return -1;
 }
 
-s_rtbuf_lib * rtbuf_lib_new ()
+s_rtbuf_lib * rtbuf_lib_new (void)
 {
   s_rtbuf_lib *lib = data_new(&g_rtbuf_lib_alloc);
   return lib;
@@ -110,7 +110,7 @@ void rtbuf_lib_delete (s_rtbuf_lib *rl)
   data_delete(&g_rtbuf_lib_alloc, rl);
 }
 
-void rtbuf_lib_delete_all ()
+void rtbuf_lib_delete_all (void)
 {
   unsigned i = 0;
   int n = g_rtbuf_lib_alloc.n;
diff --git a/librtbuf/rtbuf_proc.c b/librtbuf/rtbuf_proc.c
index fddc1c4..8e2990e 100644
--- a/librtbuf/rtbuf_proc.c
+++ b/librtbuf/rtbuf_proc.c
@@ -26,7 +26,7 @@ s_data_type g_rtbuf_proc_type = {
 s_data_alloc g_rtbuf_proc_alloc;
 s_rtbuf_proc *g_rtbuf_proc;
 
-void rtbuf_proc_init ()
+void rtbuf_proc_init (void)
 {
   data_alloc_init(&g_rtbuf_proc_alloc, &g_rtbuf_proc_type,
                   RTBUF_PROC_MAX, 0, 0);
@@ -34,7 +34,7 @@ void rtbuf_proc_init ()
   assert(g_rtbuf_proc);
 }
 
-void rtbuf_proc_shutdown ()
+void rtbuf_proc_shutdown (void)
 {
   if (g_rtbuf_proc) {
     rtbuf_proc_delete_all();
@@ -48,7 +48,7 @@ int rtbuf_proc_p (s_rtbuf_proc *proc)
   return proc && proc->name;
 }
 
-s_rtbuf_proc * rtbuf_proc_new ()
+s_rtbuf_proc * rtbuf_proc_new (void)
 {
   s_rtbuf_proc *rf = data_new(&g_rtbuf_proc_alloc);
   return rf;
@@ -60,7 +60,7 @@ void rtbuf_proc_delete (s_rtbuf_proc *proc)
   data_delete(&g_rtbuf_proc_alloc, proc);
 }
 
-void rtbuf_proc_delete_all ()
+void rtbuf_proc_delete_all (void)
 {
   unsigned i = 0;
   int n = g_rtbuf_proc_alloc.n;
diff --git a/librtbuf/rtbuf_type.c b/librtbuf/rtbuf_type.c
index ab3f635..8abee1a 100644
--- a/librtbuf/rtbuf_type.c
+++ b/librtbuf/rtbuf_type.c
@@ -26,7 +26,7 @@ s_data_type   g_rtbuf_data_type_type = {
 s_data_alloc  g_rtbuf_data_type_alloc;
 s_rtbuf_type *g_rtbuf_data_type;
 
-void rtbuf_type_init ()
+void rtbuf_type_init (void)
 {
   data_alloc_init(&g_rtbuf_data_type_alloc, &g_rtbuf_data_type_type,
                   RTBUF_TYPE_MAX, 0, 0);
@@ -44,7 +44,7 @@ void rtbuf_type_init ()
   rtbuf_type_define("double"        , sizeof(double));
 }
 
-void rtbuf_type_shutdown ()
+void rtbuf_type_shutdown (void)
 {
   if (g_rtbuf_data_type) {
     rtbuf_type_delete_all();
@@ -70,7 +70,7 @@ void rtbuf_type_delete (s_rtbuf_type *rt)
   data_delete(&g_rtbuf_data_type_alloc, rt);
 }
 
-void rtbuf_type_delete_all ()
+void rtbuf_type_delete_all (void)
 {
   unsigned i = 0;
   int n = g_rtbuf_data_type_alloc.n;
diff --git a/librtbuf/rtbuf_var.c b/librtbuf/rtbuf_var.c
index 126a196..404b283 100644
--- a/librtbuf/rtbuf_var.c
+++ b/librtbuf/rtbuf_var.c
@@ -53,11 +53,11 @@ void rtbuf_var_delete (s_rtbuf_var *var)
   data_delete(&g_rtbuf_var_alloc, var);
 }
 
-void rtbuf_var_delete_all ()
+void rtbuf_var_delete_all (void)
 {
   unsigned i = 0;
   int n = g_rtbuf_var_alloc.n;
-  while (i < g_rtbuf_var_alloc.max) {
+  while (i < g_rtbuf_var_alloc.max && n > 0) {
     if (g_rtbuf_var[i].name) {
       rtbuf_var_delete(g_rtbuf_var + i);
       n--;
diff --git a/librtbuf/symbol.c b/librtbuf/symbol.c
index 34a79ba..153ab0b 100644
--- a/librtbuf/symbol.c
+++ b/librtbuf/symbol.c
@@ -45,7 +45,7 @@ void g_str_reset (char *head)
 const char  *g_symbols[SYMBOL_MAX];
 unsigned int g_symbols_n = 0;
 
-void symbols_init () {
+void symbols_init (void) {
   bzero(g_str_start, sizeof(g_str_start));
   bzero(g_symbols, sizeof(g_symbols));
 }
diff --git a/librtbuf/symbol.h b/librtbuf/symbol.h
index e302a6e..d032d24 100644
--- a/librtbuf/symbol.h
+++ b/librtbuf/symbol.h
@@ -31,7 +31,7 @@ void   g_str_reset (char *head);
 extern symbol       g_symbols[SYMBOL_MAX];
 extern unsigned int g_symbols_n;
 
-void   symbols_init ();
+void   symbols_init (void);
 symbol symbol_new (symbol name);
 void   symbol_delete (symbol sym);
 symbol symbol_find (symbol name);
diff --git a/librtbuf/type.h b/librtbuf/type.h
index 8e3a428..57d0993 100644
--- a/librtbuf/type.h
+++ b/librtbuf/type.h
@@ -25,12 +25,12 @@ struct rtbuf_type {
 
 #define RTBUF_TYPE_MAX 1024
 
-void           rtbuf_type_init ();
-void           rtbuf_type_shutdown ();
+void           rtbuf_type_init (void);
+void           rtbuf_type_shutdown (void);
 s_rtbuf_type * rtbuf_type_new (const char *name,
                                unsigned int size);
 void           rtbuf_type_delete (s_rtbuf_type *rt);
-void           rtbuf_type_delete_all ();
+void           rtbuf_type_delete_all (void);
 s_rtbuf_type * rtbuf_type_find (symbol name);
 s_rtbuf_type * rtbuf_type_define (const char *name,
                                   unsigned int size);
diff --git a/librtbuf/var.h b/librtbuf/var.h
index a2bf8c4..2d7ab34 100644
--- a/librtbuf/var.h
+++ b/librtbuf/var.h
@@ -27,7 +27,7 @@ struct rtbuf_var {
 void          rtbuf_var_init (void);
 void          rtbuf_var_shutdown (void);
 void          rtbuf_var_delete (s_rtbuf_var *var);
-void          rtbuf_var_delete_all ();
+void          rtbuf_var_delete_all (void);
 s_rtbuf_var * rtbuf_var_find (const char *name);
 s_rtbuf_var * rtbuf_var_rtbuf_set (const char *name, unsigned i);
 void          rtbuf_var_print (const s_rtbuf_var *v);
diff --git a/test/synth b/test/synth
index c754747..48f7d36 100644
--- a/test/synth
+++ b/test/synth
@@ -4,8 +4,8 @@ let Keyboard00 = new glfw3/keyboard 100 100
 load synth/adsr
 let ADSR00 = new synth/adsr 300 300
 
-load signal/sinus
-let Osc00 = new signal/sinus 300 800
+load signal/square
+let Osc00 = new signal/square 300 800
 
 load synth/synth
 let Synth00 = new synth/synth 1000 100
@@ -14,10 +14,14 @@ bind Keyboard00 notes Synth00 notes
 bind ADSR00 signal Synth00 envelope
 bind Osc00 signal Synth00 oscillator
 
+load signal/flanger
+let Flanger00 = new signal/flanger 500 500
+
+bind Synth00 signal Flanger00 signal
+
 load portaudio/output
 let Output = new portaudio/output 1600 100
 
-bind Synth00 signal Output left
-bind Synth00 signal Output right
+bind Flanger00 signal Output left
 
 start