diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index cf34991..f22792f 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -309,6 +309,12 @@
     /* Set audio port configuration */
     static status_t setAudioPortConfig(const struct audio_port_config *config);
 
+
+    static status_t acquireSoundTriggerSession(audio_session_t *session,
+                                           audio_io_handle_t *ioHandle,
+                                           audio_devices_t *device);
+    static status_t releaseSoundTriggerSession(audio_session_t session);
+
     // ----------------------------------------------------------------------------
 
     class AudioPortCallback : public RefBase
diff --git a/include/media/IAudioPolicyService.h b/include/media/IAudioPolicyService.h
index abbda32..c251439 100644
--- a/include/media/IAudioPolicyService.h
+++ b/include/media/IAudioPolicyService.h
@@ -136,6 +136,12 @@
     virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0;
 
     virtual void registerClient(const sp<IAudioPolicyServiceClient>& client) = 0;
+
+    virtual status_t acquireSoundTriggerSession(audio_session_t *session,
+                                           audio_io_handle_t *ioHandle,
+                                           audio_devices_t *device) = 0;
+
+    virtual status_t releaseSoundTriggerSession(audio_session_t session) = 0;
 };
 
 
diff --git a/include/soundtrigger/ISoundTriggerClient.h b/include/soundtrigger/ISoundTriggerClient.h
index 7f86d02..480429a 100644
--- a/include/soundtrigger/ISoundTriggerClient.h
+++ b/include/soundtrigger/ISoundTriggerClient.h
@@ -31,6 +31,10 @@
 
     virtual void onRecognitionEvent(const sp<IMemory>& eventMemory) = 0;
 
+    virtual void onSoundModelEvent(const sp<IMemory>& eventMemory) = 0;
+
+    virtual void onServiceStateChange(const sp<IMemory>& eventMemory) = 0;
+
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/soundtrigger/ISoundTriggerHwService.h b/include/soundtrigger/ISoundTriggerHwService.h
index 05a764a..ae0cb01 100644
--- a/include/soundtrigger/ISoundTriggerHwService.h
+++ b/include/soundtrigger/ISoundTriggerHwService.h
@@ -39,6 +39,8 @@
     virtual status_t attach(const sound_trigger_module_handle_t handle,
                                       const sp<ISoundTriggerClient>& client,
                                       sp<ISoundTrigger>& module) = 0;
+
+    virtual status_t setCaptureState(bool active) = 0;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/soundtrigger/SoundTrigger.h b/include/soundtrigger/SoundTrigger.h
index 1f7f286..bf5e1de 100644
--- a/include/soundtrigger/SoundTrigger.h
+++ b/include/soundtrigger/SoundTrigger.h
@@ -18,6 +18,7 @@
 #define ANDROID_HARDWARE_SOUNDTRIGGER_H
 
 #include <binder/IBinder.h>
+#include <utils/threads.h>
 #include <soundtrigger/SoundTriggerCallback.h>
 #include <soundtrigger/ISoundTrigger.h>
 #include <soundtrigger/ISoundTriggerHwService.h>
@@ -32,12 +33,15 @@
                         public IBinder::DeathRecipient
 {
 public:
+
+    virtual ~SoundTrigger();
+
     static  status_t listModules(struct sound_trigger_module_descriptor *modules,
                                  uint32_t *numModules);
     static  sp<SoundTrigger> attach(const sound_trigger_module_handle_t module,
                                        const sp<SoundTriggerCallback>& callback);
 
-            virtual ~SoundTrigger();
+    static  status_t setCaptureState(bool active);
 
             void detach();
 
@@ -51,6 +55,8 @@
 
             // BpSoundTriggerClient
             virtual void onRecognitionEvent(const sp<IMemory>& eventMemory);
+            virtual void onSoundModelEvent(const sp<IMemory>& eventMemory);
+            virtual void onServiceStateChange(const sp<IMemory>& eventMemory);
 
             //IBinder::DeathRecipient
             virtual void binderDied(const wp<IBinder>& who);
diff --git a/include/soundtrigger/SoundTriggerCallback.h b/include/soundtrigger/SoundTriggerCallback.h
index 8a5ba02..b5277f2 100644
--- a/include/soundtrigger/SoundTriggerCallback.h
+++ b/include/soundtrigger/SoundTriggerCallback.h
@@ -31,6 +31,10 @@
 
     virtual void onRecognitionEvent(struct sound_trigger_recognition_event *event) = 0;
 
+    virtual void onSoundModelEvent(struct sound_trigger_model_event *event) = 0;
+
+    virtual void onServiceStateChange(sound_trigger_service_state_t state) = 0;
+
     virtual void onServiceDied() = 0;
 
 };