diff --git a/SDLWrapper/Sound.cpp b/SDLWrapper/Sound.cpp
index fd12b8a..5852cd2 100644
--- a/SDLWrapper/Sound.cpp
+++ b/SDLWrapper/Sound.cpp
@@ -1,20 +1,140 @@
 #include "Sound.h"
 #include "begin_code.h"
+//private
 void Sound::_set(Mix_Chunk* p)
 {
     _sound.reset(p,Mix_FreeChunk);
 }
-
-void Sound::_clear()//private
+//private
+void Sound::_clear()
 {
     _sound.reset();
 }
-
-Mix_Chunk* Sound::_get()
+//private
+Mix_Chunk* Sound::_get() const
 {
     return _sound.get();
 }
 
+Sound::Sound(const std::string& WAVFilename)
+{
+    _set(Mix_LoadWAV(WAVFilename.c_str()));
+}
+
+bool Sound::isReady() const
+{
+    return (_get()!=nullptr);
+}
+
+void Sound::release()
+{
+    _clear();
+}
+
+//private
+void Channel::_set(int ChannelID)
+{
+    _id=ChannelID;
+}
+//private
+int Channel::_get() const
+{
+    return _id;
+}
+//private
+void Channel::_clear()
+{
+    _id=-1;
+}
+//protected
+Channel::Channel()
+{
+    _id=-1;
+}
+
+Channel& Channel::playSound(Sound sound, int loops) throw (ErrorViewer)
+{
+    int cret=Mix_PlayChannel(_get(),sound._get(),loops);
+    if(cret==-1)
+    {
+        ErrorViewer e;
+        e.fetch();
+        throw e;
+    }
+    _set(cret);
+    return *this;
+}
+
+Channel& Channel::fadeIn(Sound sound, int loops, int ms) throw (ErrorViewer)
+{
+    int cret=Mix_FadeInChannel(_get(),sound._get(),loops,ms);
+    if(cret==-1)
+    {
+        ErrorViewer e;
+        e.fetch();
+        throw e;
+    }
+    _set(cret);
+    return *this;
+}
+
+
+int Channel::fadeOut(int ms)
+{
+    return Mix_FadeOutChannel(_get(), ms);
+}
+
+void Channel::pause()
+{
+    Mix_Pause(_get());
+}
+
+void Channel::resume()
+{
+    Mix_Resume(_get());
+}
+
+int Channel::stop()
+{
+    return Mix_HaltChannel(_get());
+}
+
+int Channel::setPanning(uint8_t left, uint8_t right)
+{
+    return Mix_SetPanning(_get(),left,right);
+}
+
+int Channel::setPosition(int16_t angle, uint8_t distance)
+{
+    return Mix_SetPosition(_get(),angle,distance);
+}
+
+int Channel::setDistance(uint8_t distance)
+{
+    return Mix_SetDistance(_get(),distance);
+}
+
+int Channel::setReverseStereo(int flip)
+{
+    return Mix_SetReverseStereo(_get(),flip);
+}
+
+int Channel::addEffect(Mix_EffectFunc_t f, Mix_EffectDone_t d, void* arg)
+{
+    return Mix_RegisterEffect(_get(),f,d,arg);
+}
+
+int Channel::removeEffect(Mix_EffectFunc_t f)
+{
+    return Mix_UnregisterEffect(_get(),f);
+}
+
+int Channel::removeAllEffect()
+{
+    return Mix_UnregisterAllEffects(_get());
+}
+
+
 //static
 int SoundPlayer::GetDecoderNum()
 {
@@ -32,96 +152,17 @@ SoundPlayer::SoundPlayer(int Channels)
     Mix_AllocateChannels(Channels);
 }
 
-Sound SoundPlayer::loadSound(std::string Filename) throw(ErrorViewer)
+Channel SoundPlayer::playSound(Sound sound, int loops) throw(ErrorViewer)
 {
-    Mix_Chunk* temp = Mix_LoadWAV(Filename.c_str());
-    if (temp == NULL)
-    {
-        ErrorViewer e;
-        e.fetch();
-        throw e;
-    }
-    Sound s;
-    s._set(temp);
-    return s;
+    Channel c;
+    c.playSound(sound,loops);
+    return c;
 }
 
-ChannelID SoundPlayer::playSound(Sound sound, int loops) throw(ErrorViewer)
+Channel SoundPlayer::fadeIn(Sound sound, int loops, int ms) throw(ErrorViewer)
 {
-    ChannelID id;
-    if (-1 == (id = Mix_PlayChannel(-1, sound._get(), loops)))
-    {
-        ErrorViewer e;
-        e.fetch();
-        throw e;
-    }
-    return id;
-}
-
-ChannelID SoundPlayer::fadein(Sound sound, int loops, int ms) throw(ErrorViewer)
-{
-    ChannelID id;
-    if (-1 == (id = Mix_FadeInChannel(-1, sound._get(), loops, ms)))
-    {
-        ErrorViewer e;
-        e.fetch();
-        throw e;
-    }
-    return id;
-}
-
-int SoundPlayer::fadeout(ChannelID id, int ms)
-{
-    return Mix_FadeOutChannel(id, ms);
-}
-
-void SoundPlayer::pause(ChannelID id)
-{
-    Mix_Pause(id);
-}
-
-void SoundPlayer::resume(ChannelID id)
-{
-    Mix_Resume(id);
-}
-
-int SoundPlayer::stop(ChannelID id)
-{
-    return Mix_HaltChannel(id);
-}
-
-int SoundPlayer::setPanning(ChannelID id, uint8_t left, uint8_t right)
-{
-    return Mix_SetPanning(id,left,right);
-}
-
-int SoundPlayer::setPosition(ChannelID id, int16_t angle, uint8_t distance)
-{
-    return Mix_SetPosition(id,angle,distance);
-}
-
-int SoundPlayer::setDistance(ChannelID id, uint8_t distance)
-{
-    return Mix_SetDistance(id,distance);
-}
-
-int SoundPlayer::setReverseStereo(ChannelID id, int flip)
-{
-    return Mix_SetReverseStereo(id,flip);
-}
-
-int SoundPlayer::addEffect(ChannelID id,Mix_EffectFunc_t f, Mix_EffectDone_t d, void* arg)
-{
-    return Mix_RegisterEffect(id,f,d,arg);
-}
-
-int SoundPlayer::removeEffect(ChannelID id,Mix_EffectFunc_t f)
-{
-    return Mix_UnregisterEffect(id,f);
-}
-
-int SoundPlayer::removeAllEffect(ChannelID id)
-{
-    return Mix_UnregisterAllEffects(id);
+    Channel c;
+    c.fadeIn(sound,loops,ms);
+    return c;
 }
 #include "end_code.h"
diff --git a/SDLWrapper/Sound.h b/SDLWrapper/Sound.h
index b9bb6b6..b1f677c 100644
--- a/SDLWrapper/Sound.h
+++ b/SDLWrapper/Sound.h
@@ -8,17 +8,50 @@
 class Sound
 {
 public:
-protected:
     Sound() = default;
+    Sound(const std::string& WAVFilename);
+    bool isReady() const;
+    void release();
 private:
     std::shared_ptr<Mix_Chunk> _sound;
     void _set(Mix_Chunk*);
     void _clear();
-    Mix_Chunk* _get();
-    friend class SoundPlayer;
+    Mix_Chunk* _get() const;
+
+    friend class Channel;
 };
 
-typedef int ChannelID;
+class Channel
+{
+public:
+    Channel& playSound(Sound sound,int loops) throw (ErrorViewer);
+    Channel& fadeIn(Sound sound,int loops,int ms) throw (ErrorViewer);
+
+    int fadeOut(int ms);
+    void pause();
+    void resume();
+    int stop();
+
+    /// Experimental
+    int setPanning(uint8_t left,uint8_t right);
+    int setPosition(int16_t angle,uint8_t distance);
+    int setDistance(uint8_t distance);
+    int setReverseStereo(int flip);
+
+    /// Experimental: Direct Add/Remove Effect
+    int addEffect(Mix_EffectFunc_t f, Mix_EffectDone_t d, void *arg);
+    int removeEffect(Mix_EffectFunc_t f);
+    int removeAllEffect();
+protected:
+    Channel();
+private:
+    void _set(int ChannelID);
+    int _get() const;
+    void _clear();
+
+    int _id;
+    friend class SoundPlayer;
+};
 
 class SoundPlayer : public AudioPlayer
 {
@@ -26,24 +59,8 @@ public:
     static int GetDecoderNum();
     static std::string GetDecoderName(int index);
 
-    SoundPlayer(int Channels = 16);
-    Sound loadSound(std::string Filename) throw (ErrorViewer);
-    ChannelID playSound(Sound sound, int loops) throw (ErrorViewer);
-    ChannelID fadein(Sound sound, int loops, int ms) throw (ErrorViewer);
-    int fadeout(ChannelID id, int ms);
-    void pause(ChannelID id);
-    void resume(ChannelID id);
-    int stop(ChannelID id);
-
-    /// Experimental
-    int setPanning(ChannelID id,uint8_t left,uint8_t right);
-    int setPosition(ChannelID id,int16_t angle,uint8_t distance);
-    int setDistance(ChannelID id,uint8_t distance);
-    int setReverseStereo(ChannelID id,int flip);
-
-    /// Experimental: Direct Add/Remove Effect
-    int addEffect(ChannelID id,Mix_EffectFunc_t f, Mix_EffectDone_t d, void *arg);
-    int removeEffect(ChannelID id,Mix_EffectFunc_t f);
-    int removeAllEffect(ChannelID id);
+    SoundPlayer(int NumChannels = 16);
+    Channel playSound(Sound sound, int loops) throw (ErrorViewer);
+    Channel fadeIn(Sound sound, int loops, int ms) throw (ErrorViewer);
 };
 #include "end_code.h"