diff --git a/simgear/sound/sample_openal.cxx b/simgear/sound/sample_openal.cxx
index 2eb4910d..ec494392 100644
--- a/simgear/sound/sample_openal.cxx
+++ b/simgear/sound/sample_openal.cxx
@@ -75,12 +75,13 @@ SGSoundSample::SGSoundSample() :
     reference_dist(500.0),
     max_dist(3000.),
     loop(AL_FALSE),
-    playing(false)
+    playing(false),
+    no_Doppler_effect(true)
 {
 }
 
 // constructor
-SGSoundSample::SGSoundSample( const char *path, const char *file) :
+SGSoundSample::SGSoundSample( const char *path, const char *file , bool _no_Doppler_effect ) :
     buffer(0),
     source(0),
     pitch(1.0),
@@ -88,8 +89,9 @@ SGSoundSample::SGSoundSample( const char *path, const char *file) :
     reference_dist(500.0),
     max_dist(3000.),
     loop(AL_FALSE),
-    playing(false)
-{
+    playing(false),
+    no_Doppler_effect(_no_Doppler_effect)
+    {
     SGPath samplepath( path );
     if ( strlen(file) ) {
         samplepath.append( file );
@@ -145,7 +147,7 @@ SGSoundSample::SGSoundSample( const char *path, const char *file) :
 }
 
 // constructor
-SGSoundSample::SGSoundSample( unsigned char *_data, int len, int _freq ) :
+SGSoundSample::SGSoundSample( unsigned char *_data, int len, int _freq , bool _no_Doppler_effect ) :
     buffer(0),
     source(0),
     pitch(1.0),
@@ -153,7 +155,8 @@ SGSoundSample::SGSoundSample( unsigned char *_data, int len, int _freq ) :
     reference_dist(500.0),
     max_dist(3000.),
     loop(AL_FALSE),
-    playing(false)
+    playing(false),
+    no_Doppler_effect(_no_Doppler_effect)
 {
     SG_LOG( SG_GENERAL, SG_DEBUG, "In memory sounds sample" );
 
@@ -313,6 +316,7 @@ SGSoundSample::set_source_pos( ALfloat *pos ) {
         sgAddVec3( final_pos, source_pos, offset_pos );
 
         alSourcefv( source, AL_POSITION, final_pos );
+        print_openal_error("set_source_pos");
     }
 }
 
@@ -327,6 +331,7 @@ SGSoundSample::set_offset_pos( ALfloat *pos ) {
         sgAddVec3( final_pos, source_pos, offset_pos );
 
         alSourcefv( source, AL_POSITION, final_pos );
+        print_openal_error("set_offset_pos");
     }
 }
 
@@ -350,10 +355,16 @@ SGSoundSample::set_orientation( ALfloat *dir, ALfloat inner_angle,
 }
 
 void
-SGSoundSample::set_source_vel( ALfloat *vel ) {
-    source_vel[0] = vel[0];
-    source_vel[1] = vel[1];
-    source_vel[2] = vel[2];
+SGSoundSample::set_source_vel( ALfloat *vel , ALfloat *listener_vel ) {
+    if (no_Doppler_effect) {
+        source_vel[0] = listener_vel[0];
+        source_vel[1] = listener_vel[1];
+        source_vel[2] = listener_vel[2];
+    } else {
+        source_vel[0] = vel[0];
+        source_vel[1] = vel[1];
+        source_vel[2] = vel[2];
+    }
     if (playing) {
         alSourcefv( source, AL_VELOCITY, source_vel );
     }
diff --git a/simgear/sound/sample_openal.hxx b/simgear/sound/sample_openal.hxx
index 41780783..b1559801 100644
--- a/simgear/sound/sample_openal.hxx
+++ b/simgear/sound/sample_openal.hxx
@@ -52,6 +52,7 @@
 # include <AL/alut.h>
 #endif
 
+
 SG_USING_STD(string);
 
 /**
@@ -96,6 +97,7 @@ private:
 
     bool playing;
     bool bind_source();
+    bool no_Doppler_effect;
 
 public:
 
@@ -112,7 +114,7 @@ public:
        should usually be true unless you want to manipulate the data
        later.)
      */
-    SGSoundSample( const char *path, const char *file );
+    SGSoundSample( const char *path, const char *file , bool no_Doppler_effect = true );
 
     /**
      * Constructor.
@@ -123,7 +125,7 @@ public:
        should usually be true unless you want to manipulate the data
        later.)
      */
-    SGSoundSample( unsigned char *_data, int len, int _freq );
+    SGSoundSample( unsigned char *_data, int len, int _freq , bool no_Doppler_effect = true );
 
     ~SGSoundSample();
 
@@ -208,7 +210,7 @@ public:
     /**
      * Set velocity of sound source (uses same coordinate system as opengl)
      */
-    void set_source_vel( ALfloat *vel );
+    void set_source_vel( ALfloat *vel , ALfloat *listener_vel );
 
 
     /**
diff --git a/simgear/sound/soundmgr_openal.cxx b/simgear/sound/soundmgr_openal.cxx
index d29b7fb1..0a85fcce 100644
--- a/simgear/sound/soundmgr_openal.cxx
+++ b/simgear/sound/soundmgr_openal.cxx
@@ -345,6 +345,6 @@ void SGSoundMgr::set_source_vel_all( ALfloat *vel ) {
     sample_map_iterator sample_end = samples.end();
     for ( ; sample_current != sample_end; ++sample_current ) {
 	SGSoundSample *sample = sample_current->second;
-        sample->set_source_vel( vel );
+        sample->set_source_vel( vel , listener_vel );
     }
 }
diff --git a/simgear/sound/xmlsound.cxx b/simgear/sound/xmlsound.cxx
index 078dffd7..1dfe62ab 100644
--- a/simgear/sound/xmlsound.cxx
+++ b/simgear/sound/xmlsound.cxx
@@ -272,7 +272,8 @@ SGXmlSound::init(SGPropertyNode *root, SGPropertyNode *node, SGSoundMgr *sndmgr,
        // "alSource".  The semantics of what is going on here seems
        // confused and needs to be thought through more carefully.
         _sample = new SGSoundSample( path.c_str(),
-                                    node->getStringValue("path", "") );
+                                    node->getStringValue("path", ""),
+                                    false );
 
        _mgr->add( _sample, _name );
    }