diff --git a/Engine/source/sfx/media/sfxVorbisStream.cpp b/Engine/source/sfx/media/sfxVorbisStream.cpp
index 3a2f12ba6..38e4e5d95 100644
--- a/Engine/source/sfx/media/sfxVorbisStream.cpp
+++ b/Engine/source/sfx/media/sfxVorbisStream.cpp
@@ -40,6 +40,7 @@ SFXVorbisStream* SFXVorbisStream::create( Stream *stream )
 
 SFXVorbisStream::SFXVorbisStream()
    : mVF( NULL ),
+     mBitstream(-1),
      mBytesRead( 0 )
 {
 }
@@ -47,6 +48,9 @@ SFXVorbisStream::SFXVorbisStream()
 SFXVorbisStream::SFXVorbisStream( const SFXVorbisStream& cloneFrom )
    : Parent( cloneFrom )
 {
+   mVF = NULL;
+   mBitstream = -1;
+   mBytesRead = 0;
    if( !mStream->hasCapability( Stream::StreamPosition ) )
    {
       Con::errorf( "SFXVorbisStream::SFXVorbisStream() - Source stream does not allow seeking" );
diff --git a/Engine/source/sfx/media/sfxWavStream.cpp b/Engine/source/sfx/media/sfxWavStream.cpp
index 3e5f4b983..e3833c401 100644
--- a/Engine/source/sfx/media/sfxWavStream.cpp
+++ b/Engine/source/sfx/media/sfxWavStream.cpp
@@ -94,6 +94,7 @@ SFXWavStream* SFXWavStream::create( Stream *stream )
 }
 
 SFXWavStream::SFXWavStream()
+   :mDataStart(-1)
 {
 }
 
diff --git a/Engine/source/sfx/openal/sfxALDevice.cpp b/Engine/source/sfx/openal/sfxALDevice.cpp
index 080d77d6d..58d7c0146 100644
--- a/Engine/source/sfx/openal/sfxALDevice.cpp
+++ b/Engine/source/sfx/openal/sfxALDevice.cpp
@@ -35,8 +35,11 @@ SFXALDevice::SFXALDevice(  SFXProvider *provider,
    :  Parent( name, provider, useHardware, maxBuffers ),
       mOpenAL( openal ), 
       mContext( NULL ),
-      mDevice( NULL ), 
-      mRolloffFactor( 1.0f )
+      mDevice( NULL ),
+      mDistanceModel(SFXDistanceModelLinear),
+      mDistanceFactor(1.0f),
+      mRolloffFactor( 1.0f ),
+      mUserRolloffFactor(1.0f)
 {
    mMaxBuffers = getMax( maxBuffers, 8 );
 
@@ -80,6 +83,10 @@ SFXALDevice::SFXALDevice(  SFXProvider *provider,
       SFXInternal::gUpdateThread->start();
    }
 #endif
+
+   dMemset(effectSlot, 0, sizeof(effectSlot));
+   dMemset(effect, 0, sizeof(effect));
+   uLoop = 0;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/Engine/source/sfx/openal/sfxALProvider.cpp b/Engine/source/sfx/openal/sfxALProvider.cpp
index 47b2444b3..434d4a44c 100644
--- a/Engine/source/sfx/openal/sfxALProvider.cpp
+++ b/Engine/source/sfx/openal/sfxALProvider.cpp
@@ -36,7 +36,7 @@ class SFXALProvider : public SFXProvider
 public:
 
    SFXALProvider()
-      : SFXProvider( "OpenAL" ) { mALDL = NULL; }
+      : SFXProvider( "OpenAL" ) { dMemset(&mOpenAL,0,sizeof(mOpenAL)); mALDL = NULL; }
    virtual ~SFXALProvider();
 
 protected:
diff --git a/Engine/source/sfx/sfxController.cpp b/Engine/source/sfx/sfxController.cpp
index 2d9592eef..6bb5924b9 100644
--- a/Engine/source/sfx/sfxController.cpp
+++ b/Engine/source/sfx/sfxController.cpp
@@ -75,7 +75,8 @@ ConsoleDocClass( SFXController,
 
 SFXController::SFXController( SFXPlayList* playList )
    : Parent( playList ),
-     mTrace( playList->trace() )
+     mTrace( playList->trace() ),
+   mLoopCounter(0)
 {
    VECTOR_SET_ASSOCIATION( mInsns );
    VECTOR_SET_ASSOCIATION( mSources );
diff --git a/Engine/source/sfx/sfxController.h b/Engine/source/sfx/sfxController.h
index 32039d7c4..7d2ee4980 100644
--- a/Engine/source/sfx/sfxController.h
+++ b/Engine/source/sfx/sfxController.h
@@ -93,13 +93,14 @@ class SFXController : public SFXSource
             U32 mLoopCount;
          } mArg;
          
-         Insn() {}
+         Insn()
+            : mOpcode(SFXController::OP_Delay), mSlotIndex(0), mState(NULL) {mArg.mLoopCount=0;}
          Insn( EOp opcode )
-            : mOpcode( opcode ), mSlotIndex( U32_MAX ), mState( NULL ) {}
+            : mOpcode( opcode ), mSlotIndex( U32_MAX ), mState( NULL ) {mArg.mLoopCount=0;}
          Insn( U32 slotIndex, SFXState* state )
-            : mSlotIndex( slotIndex ), mState( state ) {}
+            : mOpcode(SFXController::OP_Delay), mSlotIndex( slotIndex ), mState( state ){mArg.mLoopCount=0;}
          Insn( EOp opcode, U32 slotIndex, SFXState* state )
-            : mOpcode( opcode ), mSlotIndex( slotIndex ), mState( state ) {}
+            : mOpcode( opcode ), mSlotIndex( slotIndex ), mState( state ) {mArg.mLoopCount=0;}
       };
       
       ///
@@ -130,7 +131,7 @@ class SFXController : public SFXSource
          F32 mFadeOutTime;
          
          Source()
-            : mState( 0 ) {}
+            : mState( 0 ), mSlotIndex(0), mVolumeScale(1.0f), mPitchScale(1.0f), mFadeInTime(0), mFadeOutTime(0) {}
       };
             
       /// The current instruction in "mInsns".
@@ -169,7 +170,7 @@ class SFXController : public SFXSource
       void _genTransition( Insn& insn, SFXPlayList::ETransitionMode transition );
       
       ///
-      void _dumpInsns();
+      void _dumpInsns() {};
       
       ///
       void _initInsn();
@@ -198,7 +199,7 @@ class SFXController : public SFXSource
       ~SFXController();
    
       /// Constructor for the sake of ConsoleObject.
-      explicit SFXController() {}
+      explicit SFXController(): mIp(0), mTrace(false), mDelayEndTime(0), mLoopCounter(0) {}
                
       /// Return the playlist being played back by the controller.
       SFXPlayList* getPlayList() const;
diff --git a/Engine/source/sfx/sfxInternal.h b/Engine/source/sfx/sfxInternal.h
index 137456eac..4d0a922f5 100644
--- a/Engine/source/sfx/sfxInternal.h
+++ b/Engine/source/sfx/sfxInternal.h
@@ -324,7 +324,7 @@ class SFXWrapAroundBuffer : public SFXBuffer
 
       SFXWrapAroundBuffer( const ThreadSafeRef< SFXStream >& stream, SFXDescription* description );
       SFXWrapAroundBuffer( SFXDescription* description )
-         : Parent( description ), mBufferSize( 0 ) {}
+         : Parent( description ), mBufferSize( 0 ), mWriteOffset(0) {}
          
       virtual U32 getMemoryUsed() const { return mBufferSize; }
 };
diff --git a/Engine/source/sfx/sfxModifier.cpp b/Engine/source/sfx/sfxModifier.cpp
index 3bc98c31f..bf63f392e 100644
--- a/Engine/source/sfx/sfxModifier.cpp
+++ b/Engine/source/sfx/sfxModifier.cpp
@@ -107,6 +107,8 @@ bool SFXRangeModifier::update()
 
 SFXFadeModifier::SFXFadeModifier( SFXSource* source, F32 time, F32 endVolume, F32 startTime, EOnEnd onEndDo, bool removeWhenDone )
    : Parent( source, startTime, startTime + time, removeWhenDone ),
+     mStartVolume(source->getVolume()),
+     mCurrentVolume(source->getVolume()),
      mEndVolume( endVolume ),
      mOnEnd( onEndDo )
 {
diff --git a/Engine/source/sfx/sfxModifier.h b/Engine/source/sfx/sfxModifier.h
index 182609964..39f2a7316 100644
--- a/Engine/source/sfx/sfxModifier.h
+++ b/Engine/source/sfx/sfxModifier.h
@@ -47,7 +47,7 @@ class SFXModifier : public IPolled
    
       /// Create an effect that operates on "source".
       SFXModifier( SFXSource* source, bool removeWhenDone = false )
-         : mSource( source ) {}
+         : mSource( source ), mRemoveWhenDone(removeWhenDone) {}
    
       virtual ~SFXModifier() {}
 };
diff --git a/Engine/source/sfx/sfxSound.cpp b/Engine/source/sfx/sfxSound.cpp
index 6b4895f80..c62c41605 100644
--- a/Engine/source/sfx/sfxSound.cpp
+++ b/Engine/source/sfx/sfxSound.cpp
@@ -68,7 +68,7 @@ ConsoleDocClass( SFXSound,
 //-----------------------------------------------------------------------------
 
 SFXSound::SFXSound()
-   : mVoice( NULL )
+   : mVoice( NULL ), mDuration(0), mSetPositionValue(0)
 {
    // NOTE: This should never be used directly 
    // and is only here to satisfy satisfy the
@@ -79,7 +79,7 @@ SFXSound::SFXSound()
 
 SFXSound::SFXSound( SFXProfile *profile, SFXDescription* desc )
    :  Parent( profile, desc ),
-      mVoice( NULL )
+      mVoice( NULL ), mDuration(0)
 {
    mSetPositionValue = 0;
 }
diff --git a/Engine/source/sfx/sfxWorld.h b/Engine/source/sfx/sfxWorld.h
index 289455b69..427e4721d 100644
--- a/Engine/source/sfx/sfxWorld.h
+++ b/Engine/source/sfx/sfxWorld.h
@@ -208,7 +208,7 @@ class SFXWorld : public ScopeTracker< NUM_DIMENSIONS, Object >
          /// between this space and the space above us in the stack.
          Object mObject;
          
-         Scope() {}
+         Scope() :mSortValue(0), mSoundscape(NULL) {}
          Scope( F32 sortValue, Object object )
             : mSortValue( sortValue ),
               mSoundscape( NULL ),