diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index d6c3bc5..0c69ec2 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -28,6 +28,7 @@
 #include <utils/Log.h>
 #include <private/media/AudioTrackShared.h>
 #include <media/IAudioFlinger.h>
+#include <media/AudioPolicyHelper.h>
 #include <media/AudioResamplerPublic.h>
 
 #define WAIT_PERIOD_MS                  10
@@ -278,30 +279,22 @@
     }
 
     // handle default values first.
-    // TODO once AudioPolicyManager fully supports audio_attributes_t,
-    //   remove stream "text-to-speech" redirect
-    if ((streamType == AUDIO_STREAM_DEFAULT) || (streamType == AUDIO_STREAM_TTS)) {
+    if (streamType == AUDIO_STREAM_DEFAULT) {
         streamType = AUDIO_STREAM_MUSIC;
     }
-
     if (pAttributes == NULL) {
         if (uint32_t(streamType) >= AUDIO_STREAM_PUBLIC_CNT) {
             ALOGE("Invalid stream type %d", streamType);
             return BAD_VALUE;
         }
-        setAttributesFromStreamType(streamType);
         mStreamType = streamType;
+
     } else {
-        if (!isValidAttributes(pAttributes)) {
-            ALOGE("Invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
-                pAttributes->usage, pAttributes->content_type, pAttributes->flags,
-                pAttributes->tags);
-        }
         // stream type shouldn't be looked at, this track has audio attributes
         memcpy(&mAttributes, pAttributes, sizeof(audio_attributes_t));
-        setStreamTypeFromAttributes(mAttributes);
         ALOGV("Building AudioTrack with attributes: usage=%d content=%d flags=0x%x tags=[%s]",
                 mAttributes.usage, mAttributes.content_type, mAttributes.flags, mAttributes.tags);
+        mStreamType = AUDIO_STREAM_DEFAULT;
     }
 
     // these below should probably come from the audioFlinger too...
@@ -341,10 +334,6 @@
                 // FIXME why can't we allow direct AND fast?
                 ((flags | AUDIO_OUTPUT_FLAG_DIRECT) & ~AUDIO_OUTPUT_FLAG_FAST);
     }
-    // only allow deep buffering for music stream type
-    if (mStreamType != AUDIO_STREAM_MUSIC) {
-        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
-    }
 
     if (flags & AUDIO_OUTPUT_FLAG_DIRECT) {
         if (audio_is_linear_pcm(format)) {
@@ -915,24 +904,38 @@
     return status;
 }
 
+audio_stream_type_t AudioTrack::streamType() const
+{
+    if (mStreamType == AUDIO_STREAM_DEFAULT) {
+        return audio_attributes_to_stream_type(&mAttributes);
+    }
+    return mStreamType;
+}
+
 // -------------------------------------------------------------------------
 
 // must be called with mLock held
 status_t AudioTrack::createTrack_l()
 {
-    status_t status;
     const sp<IAudioFlinger>& audioFlinger = AudioSystem::get_audio_flinger();
     if (audioFlinger == 0) {
         ALOGE("Could not get audioflinger");
         return NO_INIT;
     }
 
-    audio_io_handle_t output = AudioSystem::getOutputForAttr(&mAttributes, mSampleRate, mFormat,
-            mChannelMask, mFlags, mOffloadInfo);
-    if (output == AUDIO_IO_HANDLE_NONE) {
+    audio_io_handle_t output;
+    audio_stream_type_t streamType = mStreamType;
+    audio_attributes_t *attr = (mStreamType == AUDIO_STREAM_DEFAULT) ? &mAttributes : NULL;
+    status_t status = AudioSystem::getOutputForAttr(attr, &output,
+                                                    (audio_session_t)mSessionId, &streamType,
+                                                    mSampleRate, mFormat, mChannelMask,
+                                                    mFlags, mOffloadInfo);
+
+
+    if (status != NO_ERROR || output == AUDIO_IO_HANDLE_NONE) {
         ALOGE("Could not get audio output for stream type %d, usage %d, sample rate %u, format %#x,"
               " channel mask %#x, flags %#x",
-              mStreamType, mAttributes.usage, mSampleRate, mFormat, mChannelMask, mFlags);
+              streamType, mAttributes.usage, mSampleRate, mFormat, mChannelMask, mFlags);
         return BAD_VALUE;
     }
     {
@@ -1086,7 +1089,7 @@
 
     size_t temp = frameCount;   // temp may be replaced by a revised value of frameCount,
                                 // but we will still need the original value also
-    sp<IAudioTrack> track = audioFlinger->createTrack(mStreamType,
+    sp<IAudioTrack> track = audioFlinger->createTrack(streamType,
                                                       mSampleRate,
                                                       // AudioFlinger only sees 16-bit PCM
                                                       mFormat == AUDIO_FORMAT_PCM_8_BIT &&
@@ -1232,7 +1235,7 @@
     }
 
 release:
-    AudioSystem::releaseOutput(output);
+    AudioSystem::releaseOutput(output, streamType, (audio_session_t)mSessionId);
     if (status == NO_ERROR) {
         status = NO_INIT;
     }
@@ -2066,161 +2069,6 @@
     return mProxy->getUnderrunFrames();
 }
 
-void AudioTrack::setAttributesFromStreamType(audio_stream_type_t streamType) {
-    mAttributes.flags = 0x0;
-
-    switch(streamType) {
-    case AUDIO_STREAM_DEFAULT:
-    case AUDIO_STREAM_MUSIC:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_MUSIC;
-        mAttributes.usage = AUDIO_USAGE_MEDIA;
-        break;
-    case AUDIO_STREAM_VOICE_CALL:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SPEECH;
-        mAttributes.usage = AUDIO_USAGE_VOICE_COMMUNICATION;
-        break;
-    case AUDIO_STREAM_ENFORCED_AUDIBLE:
-        mAttributes.flags  |= AUDIO_FLAG_AUDIBILITY_ENFORCED;
-        // intended fall through, attributes in common with STREAM_SYSTEM
-    case AUDIO_STREAM_SYSTEM:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
-        mAttributes.usage = AUDIO_USAGE_ASSISTANCE_SONIFICATION;
-        break;
-    case AUDIO_STREAM_RING:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
-        mAttributes.usage = AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
-        break;
-    case AUDIO_STREAM_ALARM:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
-        mAttributes.usage = AUDIO_USAGE_ALARM;
-        break;
-    case AUDIO_STREAM_NOTIFICATION:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
-        mAttributes.usage = AUDIO_USAGE_NOTIFICATION;
-        break;
-    case AUDIO_STREAM_BLUETOOTH_SCO:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SPEECH;
-        mAttributes.usage = AUDIO_USAGE_VOICE_COMMUNICATION;
-        mAttributes.flags |= AUDIO_FLAG_SCO;
-        break;
-    case AUDIO_STREAM_DTMF:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
-        mAttributes.usage = AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
-        break;
-    case AUDIO_STREAM_TTS:
-        mAttributes.content_type = AUDIO_CONTENT_TYPE_SPEECH;
-        mAttributes.usage = AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
-        break;
-    default:
-        ALOGE("invalid stream type %d when converting to attributes", streamType);
-    }
-}
-
-void AudioTrack::setStreamTypeFromAttributes(audio_attributes_t& aa) {
-    // flags to stream type mapping
-    if ((aa.flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
-        mStreamType = AUDIO_STREAM_ENFORCED_AUDIBLE;
-        return;
-    }
-    if ((aa.flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
-        mStreamType = AUDIO_STREAM_BLUETOOTH_SCO;
-        return;
-    }
-    // TODO once AudioPolicyManager fully supports audio_attributes_t,
-    //   remove stream remap, the flag will be enough
-    if ((aa.flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
-        mStreamType = AUDIO_STREAM_TTS;
-        return;
-    }
-
-    // usage to stream type mapping
-    switch (aa.usage) {
-    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY: {
-        // TODO once AudioPolicyManager fully supports audio_attributes_t,
-        //   remove stream change based on stream activity
-        bool active;
-        status_t status = AudioSystem::isStreamActive(AUDIO_STREAM_RING, &active, 0);
-        if (status == NO_ERROR && active == true) {
-            mStreamType = AUDIO_STREAM_RING;
-            break;
-        }
-        status = AudioSystem::isStreamActive(AUDIO_STREAM_ALARM, &active, 0);
-        if (status == NO_ERROR && active == true) {
-            mStreamType = AUDIO_STREAM_ALARM;
-            break;
-        }
-        audio_mode_t phoneState = AudioSystem::getPhoneState();
-        if (phoneState == AUDIO_MODE_IN_CALL || phoneState == AUDIO_MODE_IN_COMMUNICATION) {
-            mStreamType = AUDIO_STREAM_VOICE_CALL;
-            break;
-        }
-    }    /// FALL THROUGH
-    case AUDIO_USAGE_MEDIA:
-    case AUDIO_USAGE_GAME:
-    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
-        mStreamType = AUDIO_STREAM_MUSIC;
-        return;
-    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
-        mStreamType = AUDIO_STREAM_SYSTEM;
-        return;
-    case AUDIO_USAGE_VOICE_COMMUNICATION:
-        mStreamType = AUDIO_STREAM_VOICE_CALL;
-        return;
-
-    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
-        mStreamType = AUDIO_STREAM_DTMF;
-        return;
-
-    case AUDIO_USAGE_ALARM:
-        mStreamType = AUDIO_STREAM_ALARM;
-        return;
-    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
-        mStreamType = AUDIO_STREAM_RING;
-        return;
-
-    case AUDIO_USAGE_NOTIFICATION:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
-    case AUDIO_USAGE_NOTIFICATION_EVENT:
-        mStreamType = AUDIO_STREAM_NOTIFICATION;
-        return;
-
-    case AUDIO_USAGE_UNKNOWN:
-    default:
-        mStreamType = AUDIO_STREAM_MUSIC;
-    }
-}
-
-bool AudioTrack::isValidAttributes(const audio_attributes_t *paa) {
-    // has flags that map to a strategy?
-    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
-        return true;
-    }
-
-    // has known usage?
-    switch (paa->usage) {
-    case AUDIO_USAGE_UNKNOWN:
-    case AUDIO_USAGE_MEDIA:
-    case AUDIO_USAGE_VOICE_COMMUNICATION:
-    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
-    case AUDIO_USAGE_ALARM:
-    case AUDIO_USAGE_NOTIFICATION:
-    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
-    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
-    case AUDIO_USAGE_NOTIFICATION_EVENT:
-    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
-    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
-    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
-    case AUDIO_USAGE_GAME:
-        break;
-    default:
-        return false;
-    }
-    return true;
-}
 // =========================================================================
 
 void AudioTrack::DeathNotifier::binderDied(const wp<IBinder>& who __unused)