diff --git a/examples/DSPE_examples.h b/examples/DSPE_examples.h
index 5bd1f3c5e2806f862dd60ed578223c15d34de1ec..bbaa0df1b52d6a90b66a56fb94fd35cb18e91e78 100644
--- a/examples/DSPE_examples.h
+++ b/examples/DSPE_examples.h
@@ -9,7 +9,7 @@
 #define EXAMPLES_DSPE_EXAMPLES_H_
 
 int test_hello(void);
-int test_sound_input(void);
+int test_sound_input(bool use_audio_output = true);
 
 
 #endif /* EXAMPLES_DSPE_EXAMPLES_H_ */
diff --git a/examples/sound_input.cpp b/examples/sound_input.cpp
index d25e3966adbf53907aabf4909884c9fab0c4cfec..da1364f234ba12f3b3ab5ae11461f2767f8d751e 100644
--- a/examples/sound_input.cpp
+++ b/examples/sound_input.cpp
@@ -7,11 +7,14 @@
 
 #ifndef INCLUDE_DSPE_EXAMPLES
 int main(void)
+{
+  bool use_audio_output = true;
 #else
 #include "DSPE_examples.h"
-int test_sound_input(void)
-#endif // INCLUDE_DSPE_EXAMPLES
+int test_sound_input(bool use_audio_output)
 {
+#endif // INCLUDE_DSPE_EXAMPLES
+
   DSP::Clock_ptr MasterClock, AudioInClock;
   string tekst;
   int temp;
@@ -33,9 +36,13 @@ int test_sound_input(void)
 
   Fp = WaveIn.GetSamplingRate();
 
-  DSP::u::AudioOutput AudioOut(Fp);
+  std::shared_ptr<DSP::Block> AudioOut = nullptr;
+  if (use_audio_output == true)
+    AudioOut.reset(new DSP::u::AudioOutput(Fp));
+  else
+    AudioOut.reset(new DSP::u::Vacuum(1U));
 
-  WaveIn.Output("out") >> AudioOut.Input("in");
+  WaveIn.Output("out") >> AudioOut->Input("in");
 
   Fp2 = 8000;
   long Fp_gcd = DSP::f::gcd(Fp, Fp2);
@@ -56,8 +63,9 @@ int test_sound_input(void)
     DSP::log << "MAIN" << DSP::e::LogMode::second << temp << endl;
     temp++;
   }
-  while (WaveIn.GetBytesRead() != 0);
+  while ((temp <= 8) || (WaveIn.GetBytesRead() != 0));
 
+  AudioOut.reset();
   DSP::Clock::FreeClocks();
   DSP::log << DSP::e::LogMode::Error << "MAIN" << DSP::e::LogMode::second << "end" << endl;
 
diff --git a/src/Main.cpp b/src/Main.cpp
index eb68ee86d67e33bfc0599c522f4989e4bedfef81..333f2403aec0ea66342d53119a60e1c013dfc132 100644
--- a/src/Main.cpp
+++ b/src/Main.cpp
@@ -2977,7 +2977,8 @@ int main(int argc, char*argv[])
   DSP::log << DSP::e::LogMode::Error << "Finished test_hello" << endl;
 
   DSP::log << "Starting test_sound_input" << endl;
-  test_sound_input();
+  bool use_audio_output = false;
+  test_sound_input(use_audio_output);
   DSP::log << DSP::e::LogMode::Error << "Finished test_sound_input" << endl;
 
 #endif // INCLUDE_DSPE_EXAMPLES