diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index a5d4c6c..dffa099 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -3383,9 +3383,9 @@
 }
 
 // getTrackName_l() must be called with ThreadBase::mLock held
-int AudioFlinger::MixerThread::getTrackName_l(audio_channel_mask_t channelMask)
+int AudioFlinger::MixerThread::getTrackName_l(audio_channel_mask_t channelMask, int sessionId)
 {
-    return mAudioMixer->getTrackName(channelMask);
+    return mAudioMixer->getTrackName(channelMask, sessionId);
 }
 
 // deleteTrackName_l() must be called with ThreadBase::mLock held
@@ -3828,7 +3828,8 @@
 }
 
 // getTrackName_l() must be called with ThreadBase::mLock held
-int AudioFlinger::DirectOutputThread::getTrackName_l(audio_channel_mask_t channelMask)
+int AudioFlinger::DirectOutputThread::getTrackName_l(audio_channel_mask_t channelMask,
+        int sessionId)
 {
     return 0;
 }
@@ -4293,7 +4294,7 @@
         // 16 bit because data is converted to 16 bit before being stored in buffer by AudioTrack
         mCblk->frameSize = audio_is_linear_pcm(format) ? mChannelCount * sizeof(int16_t) : sizeof(uint8_t);
         // to avoid leaking a track name, do not allocate one unless there is an mCblk
-        mName = thread->getTrackName_l(channelMask);
+        mName = thread->getTrackName_l(channelMask, sessionId);
         mCblk->mName = mName;
         if (mName < 0) {
             ALOGE("no more track names available");
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 5ffa5a6..216e3fa 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -1086,7 +1086,7 @@
 
         // Allocate a track name for a given channel mask.
         //   Returns name >= 0 if successful, -1 on failure.
-        virtual int             getTrackName_l(audio_channel_mask_t channelMask) = 0;
+        virtual int             getTrackName_l(audio_channel_mask_t channelMask, int sessionId) = 0;
         virtual void            deleteTrackName_l(int name) = 0;
 
         // Time to sleep between cycles when:
@@ -1254,7 +1254,7 @@
         virtual     bool        checkForNewParameters_l();
 
     protected:
-        virtual     int         getTrackName_l(audio_channel_mask_t channelMask);
+        virtual     int         getTrackName_l(audio_channel_mask_t channelMask, int sessionId);
         virtual     void        deleteTrackName_l(int name);
         virtual     uint32_t    activeSleepTimeUs() const;
         virtual     uint32_t    idleSleepTimeUs() const;
diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index 183c1f3..1f13625 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -163,7 +163,7 @@
     delete [] mState.resampleTemp;
 }
 
-int AudioMixer::getTrackName(audio_channel_mask_t channelMask)
+int AudioMixer::getTrackName(audio_channel_mask_t channelMask, int sessionId)
 {
     uint32_t names = (~mTrackNames) & mConfiguredNames;
     if (names != 0) {
@@ -189,6 +189,7 @@
         t->enabled = false;
         t->format = 16;
         t->channelMask = AUDIO_CHANNEL_OUT_STEREO;
+        t->sessionId = sessionId;
         // setBufferProvider(name, AudioBufferProvider *) is required before enable(name)
         t->bufferProvider = NULL;
         t->buffer.raw = NULL;
@@ -269,7 +270,7 @@
     }
 
     if (EffectCreate(&dwnmFxDesc.uuid,
-            -2 /*sessionId*/, -2 /*ioId*/,// both not relevant here, using random value
+            pTrack->sessionId /*sessionId*/, -2 /*ioId not relevant here, using random value*/,
             &pDbp->mDownmixHandle/*pHandle*/) != 0) {
         ALOGE("prepareTrackForDownmix(%d) fails: error creating downmixer effect", trackName);
         goto noDownmixForActiveTrack;
diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h
index 6c80253..dc468ff 100644
--- a/services/audioflinger/AudioMixer.h
+++ b/services/audioflinger/AudioMixer.h
@@ -91,7 +91,7 @@
     // For all APIs with "name": TRACK0 <= name < TRACK0 + MAX_NUM_TRACKS
 
     // Allocate a track name.  Returns new track name if successful, -1 on failure.
-    int         getTrackName(audio_channel_mask_t channelMask);
+    int         getTrackName(audio_channel_mask_t channelMask, int sessionId);
 
     // Free an allocated track by name
     void        deleteTrackName(int name);
@@ -190,7 +190,9 @@
 
         DownmixerBufferProvider* downmixerBufferProvider; // 4 bytes
 
-        int32_t     padding[3];
+        int32_t     sessionId;
+
+        int32_t     padding[2];
 
         // 16-byte boundary