Index: examples/Makefile.am
===================================================================
--- examples/Makefile.am	(revision edca23f0ac3361fd26a4b83d2a5588c451791bfb)
+++ examples/Makefile.am	(revision b78805a67bc32ed91a6da4e02647755dbbdf6338)
@@ -9,4 +9,5 @@
 bin_PROGRAMS = \
 	aubioonset \
+	aubiotrack \
 	aubionotes
 	
@@ -16,5 +17,7 @@
 aubioonset_SOURCES = aubioonset.c utils.c
 aubionotes_SOURCES = aubionotes.c utils.c
+aubiotrack_SOURCES = aubiotrack.c utils.c
 
 aubioonset_LDADD = @JACK_LIBS@
 aubionotes_LDADD = @JACK_LIBS@
+aubiotrack_LDADD = @JACK_LIBS@
Index: examples/aubiotrack.c
===================================================================
--- examples/aubiotrack.c	(revision b78805a67bc32ed91a6da4e02647755dbbdf6338)
+++ examples/aubiotrack.c	(revision b78805a67bc32ed91a6da4e02647755dbbdf6338)
@@ -0,0 +1,146 @@
+/*
+   Copyright (C) 2003 Paul Brossier
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "utils.h"
+#include "beattracking.h"
+
+unsigned int pos          = 0;    /* frames%dspblocksize */
+unsigned int pos2         = 0;    /* frames%dspblocksize */
+uint_t usepitch           = 0;
+fvec_t * dfframe          = NULL;
+fvec_t * out              = NULL;
+aubio_beattracking_t * bt = NULL;
+uint_t winlen             = 512;
+uint_t step               = 128;
+uint_t laglen             = 128;
+uint_t rayparam           = 43;
+uint_t istactus           = 0;
+
+int aubio_process(float **input, float **output, int nframes);
+int aubio_process(float **input, float **output, int nframes) {
+  unsigned int i;       /*channels*/
+  unsigned int j;       /*frames*/
+  smpl_t * btoutput = out->data[0];
+  for (j=0;j<nframes;j++) {
+    if(usejack) {
+      for (i=0;i<channels;i++) {
+        /* write input to datanew */
+        fvec_write_sample(ibuf, input[i][j], i, pos);
+        /* put synthnew in output */
+        output[i][j] = fvec_read_sample(obuf, i, pos);
+      }
+    }
+    /*time for fft*/
+    if (pos == overlap_size-1) {         
+      /* block loop */
+      aubio_pvoc_do (pv,ibuf, fftgrain);
+      aubio_onsetdetection(o,fftgrain, onset);
+      if (usedoubled) {
+        aubio_onsetdetection(o2,fftgrain, onset2);
+        onset->data[0][0] *= onset2->data[0][0];
+      }
+      /* execute every overlap_size*step */
+      if (pos2 == step -1 ) {
+              
+        /* check dfframe */
+        /*
+        outmsg("\n");
+        for (i = 0; i < winlen; i++ ) 
+                outmsg("%f,", dfframe->data[0][i]);
+        outmsg("\n");
+        */
+                        
+        aubio_beattracking_do(bt,dfframe,out);
+
+        /* rotate dfframe */
+        for (i = 0 ; i < winlen - step; i++ ) 
+                dfframe->data[0][i] = dfframe->data[0][i+step];
+        for (i = winlen - step ; i < winlen; i++ ) 
+                dfframe->data[0][i] = 0.;
+                
+        pos2 = -1;
+      }
+      pos2++;
+      isonset = aubio_peakpick_pimrt_wt(onset,parms,&(dfframe->data[0][winlen - step + pos2]));
+      /* end of second level loop */
+      istactus = 0;
+      i=0;
+      for (i = 1; i <= btoutput[0]; i++ ) { 
+              if (pos2 == btoutput[i] && btoutput[i] != 0.) {
+                      //printf("pos2: %d\n", pos2);
+                      /* test for silence */
+                      if (aubio_silence_detection(ibuf, threshold2)==1) {
+                              isonset  = 0;
+                              istactus = 0;
+                      } else {
+                              istactus = 1;
+                      }
+              }
+      }
+
+      if (istactus ==1) {
+              for (pos = 0; pos < overlap_size; pos++)
+                      obuf->data[0][pos] = woodblock->data[0][pos];
+      } else {
+              for (pos = 0; pos < overlap_size; pos++)
+                      obuf->data[0][pos] = 0.;
+      }
+      /* end of block loop */
+      pos = -1; /* so it will be zero next j loop */
+    }
+    pos++;
+  }
+  return 1;
+}
+
+void process_print (void);
+void process_print (void) {
+        if (output_filename == NULL) {
+                if (istactus)
+                        outmsg("%d\t%f",pos2,(frames)*overlap_size/(float)samplerate); 
+                if (isonset)
+                        outmsg(" \t \t%f\n",(frames)*overlap_size/(float)samplerate);
+        }
+}
+
+int main(int argc, char **argv) {
+  
+  /* override default settings */
+  examples_common_init(argc,argv);
+
+  dfframe = new_fvec(winlen,channels);
+  out = new_fvec(step,channels);
+  /* test input : impulses starting from 15, at intervals of 50 samples */
+  //for(i=0;i<16;i++){ 
+  //        dfframe->data[0][50*i+14] = 1.;
+  //}
+
+  bt = new_aubio_beattracking(winlen,step, laglen,
+                  rayparam, channels);
+
+  examples_common_process(aubio_process,process_print);
+
+  examples_common_del();
+
+  debug("End of program.\n");
+
+  fflush(stderr);
+
+  return 0;
+}
+
