diff --git a/app/src/main/cpp/sox/example0.c b/app/src/main/cpp/sox/example0.c
index a7bc48c..1163681 100644
--- a/app/src/main/cpp/sox/example0.c
+++ b/app/src/main/cpp/sox/example0.c
@@ -70,10 +70,15 @@ int main(int argc, char * argv[])
   assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
   free(e);
 
-  /* Create the `flanger' effect, and initialise it with default parameters: */
-  e = sox_create_effect(sox_find_effect("flanger"));
-  assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
-  /* Add the effect to the end of the effects processing chain: */
+  args[0] = "--wet-only";
+  args[1] = "50";  // reverberance [0, 100] 50%
+  args[2] = "50";  // hf_damping [0, 100] 50%
+  args[3] = "100"; // room_scale [0, 100] 100%
+  args[4] = "100"; // stereo_depth [0, 100] 100%
+  args[5] = "0";   // pre_delay_ms [0, 500] 0ms
+  args[6] = "0";   // wet_gain_dB [-10, 10] 0dB
+  e = sox_create_effect(sox_find_effect("reverb"));
+  assert(sox_effect_options(e, 7, args) == SOX_SUCCESS);
   assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
   free(e);
 
diff --git a/app/src/main/cpp/sox/example3.c b/app/src/main/cpp/sox/example3.c
deleted file mode 100644
index e49d126..0000000
--- a/app/src/main/cpp/sox/example3.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/* Simple example of using SoX libraries
- *
- * Copyright (c) 2007-9 robs@users.sourceforge.net
- *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
-#undef NDEBUG /* Must undef above assert.h or other that might include it. */
-#endif
-
-#include "sox.h"
-#include "util.h"
-#include <stdio.h>
-#include <assert.h>
-
-/*
- * Example of a custom output message handler.
- */
-static void output_message(unsigned level, const char *filename, const char *fmt, va_list ap)
-{
-  char const * const str[] = {"FAIL", "WARN", "INFO", "DBUG"};
-  if (sox_globals.verbosity >= level) {
-    char base_name[128];
-    sox_basename(base_name, sizeof(base_name), filename);
-    fprintf(stderr, "%s %s: ", str[min(level - 1, 3)], base_name);
-    vfprintf(stderr, fmt, ap);
-    fprintf(stderr, "\n");
-  }
-}
-
-/*
- * On an alsa capable system, plays an audio file starting 10 seconds in.
- * Copes with sample-rate and channel change if necessary since its
- * common for audio drivers to support a subset of rates and channel
- * counts.
- * E.g. example3 song2.ogg
- *
- * Can easily be changed to work with other audio device drivers supported
- * by libSoX; e.g. "oss", "ao", "coreaudio", etc.
- * See the soxformat(7) manual page.
- */
-int main(int argc, char * argv[])
-{
-  static sox_format_t * in, * out; /* input and output files */
-  sox_effects_chain_t * chain;
-  sox_effect_t * e;
-  sox_signalinfo_t interm_signal;
-  char * args[10];
-
-  assert(argc == 2);
-  sox_globals.output_message_handler = output_message;
-  sox_globals.verbosity = 1;
-
-  assert(sox_init() == SOX_SUCCESS);
-  assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
-  /* Change "alsa" in this line to use an alternative audio device driver: */
-  assert((out= sox_open_write("default", &in->signal, NULL, "alsa", NULL, NULL)));
-
-  chain = sox_create_effects_chain(&in->encoding, &out->encoding);
-
-  interm_signal = in->signal; /* NB: deep copy */
-
-  e = sox_create_effect(sox_find_effect("input"));
-  args[0] = (char *)in, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
-  assert(sox_add_effect(chain, e, &interm_signal, &in->signal) == SOX_SUCCESS);
-  free(e);
-
-  e = sox_create_effect(sox_find_effect("trim"));
-  args[0] = "10", assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
-  assert(sox_add_effect(chain, e, &interm_signal, &in->signal) == SOX_SUCCESS);
-  free(e);
-
-  if (in->signal.rate != out->signal.rate) {
-    e = sox_create_effect(sox_find_effect("rate"));
-    assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
-    assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
-    free(e);
-  }
-
-  if (in->signal.channels != out->signal.channels) {
-    e = sox_create_effect(sox_find_effect("channels"));
-    assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
-    assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
-    free(e);
-  }
-
-  e = sox_create_effect(sox_find_effect("output"));
-  args[0] = (char *)out, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
-  assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
-  free(e);
-
-  sox_flow_effects(chain, NULL, NULL);
-
-  sox_delete_effects_chain(chain);
-  sox_close(out);
-  sox_close(in);
-  sox_quit();
-
-  return 0;
-}