diff --git a/src/Sound/soundmgr.cxx b/src/Sound/soundmgr.cxx
index 7a70607bd..bc3386539 100644
--- a/src/Sound/soundmgr.cxx
+++ b/src/Sound/soundmgr.cxx
@@ -64,6 +64,8 @@ FGSimpleSound::~FGSimpleSound() {
 // constructor
 FGSoundMgr::FGSoundMgr() {
     audio_sched = new slScheduler( 8000 );
+    audio_sched -> setMaxConcurrent ( 6 ); 
+
     audio_mixer = new smMixer;
 
     SG_LOG( SG_GENERAL, SG_INFO,