diff --git a/include/media/AudioRecord.h b/include/media/AudioRecord.h
index 605680a..2fb69b6 100644
--- a/include/media/AudioRecord.h
+++ b/include/media/AudioRecord.h
@@ -385,6 +385,8 @@
     uint32_t                mChannelMask;
     audio_io_handle_t       mInput;
     int                     mSessionId;
+    int                     mPreviousPriority;          // before start()
+    int                     mPreviousSchedulingGroup;
 };
 
 }; // namespace android
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index d1a8105..f71965e 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -487,6 +487,8 @@
     int                     mAuxEffectId;
     Mutex                   mLock;
     status_t                mRestoreStatus;
+    int                     mPreviousPriority;          // before start()
+    int                     mPreviousSchedulingGroup;
 };
 
 
diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index f32929e..1d8e15b 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -80,7 +80,8 @@
 // ---------------------------------------------------------------------------
 
 AudioRecord::AudioRecord()
-    : mStatus(NO_INIT), mSessionId(0)
+    : mStatus(NO_INIT), mSessionId(0),
+      mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT)
 {
 }
 
@@ -95,7 +96,8 @@
         void* user,
         int notificationFrames,
         int sessionId)
-    : mStatus(NO_INIT), mSessionId(0)
+    : mStatus(NO_INIT), mSessionId(0),
+      mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT)
 {
     mStatus = set(inputSource, sampleRate, format, channelMask,
             frameCount, flags, cbf, user, notificationFrames, sessionId);
@@ -326,9 +328,11 @@
             cblk->bufferTimeoutMs = MAX_RUN_TIMEOUT_MS;
             cblk->waitTimeMs = 0;
             if (t != 0) {
-               t->run("ClientRecordThread", ANDROID_PRIORITY_AUDIO);
+                t->run("ClientRecordThread", ANDROID_PRIORITY_AUDIO);
             } else {
-                setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_AUDIO);
+                mPreviousPriority = getpriority(PRIO_PROCESS, 0);
+                mPreviousSchedulingGroup = androidGetThreadSchedulingGroup(0);
+                androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
             }
         } else {
             mActive = 0;
@@ -363,7 +367,8 @@
         if (t != 0) {
             t->requestExit();
         } else {
-            setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL);
+            setpriority(PRIO_PROCESS, 0, mPreviousPriority);
+            androidSetThreadSchedulingGroup(0, mPreviousSchedulingGroup);
         }
     }
 
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 8ccba80..7e55fbd 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -79,7 +79,8 @@
 // ---------------------------------------------------------------------------
 
 AudioTrack::AudioTrack()
-    : mStatus(NO_INIT)
+    : mStatus(NO_INIT),
+      mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT)
 {
 }
 
@@ -94,7 +95,8 @@
         void* user,
         int notificationFrames,
         int sessionId)
-    : mStatus(NO_INIT)
+    : mStatus(NO_INIT),
+      mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT)
 {
     mStatus = set(streamType, sampleRate, format, channelMask,
             frameCount, flags, cbf, user, notificationFrames,
@@ -112,7 +114,8 @@
         void* user,
         int notificationFrames,
         int sessionId)
-    : mStatus(NO_INIT)
+    : mStatus(NO_INIT),
+      mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT)
 {
     mStatus = set(streamType, sampleRate, format, channelMask,
             0, flags, cbf, user, notificationFrames,
@@ -346,9 +349,11 @@
         cblk->waitTimeMs = 0;
         android_atomic_and(~CBLK_DISABLED_ON, &cblk->flags);
         if (t != 0) {
-           t->run("AudioTrackThread", ANDROID_PRIORITY_AUDIO);
+            t->run("AudioTrackThread", ANDROID_PRIORITY_AUDIO);
         } else {
-            setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_AUDIO);
+            mPreviousPriority = getpriority(PRIO_PROCESS, 0);
+            mPreviousSchedulingGroup = androidGetThreadSchedulingGroup(0);
+            androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
         }
 
         ALOGV("start %p before lock cblk %p", this, mCblk);
@@ -370,7 +375,8 @@
             if (t != 0) {
                 t->requestExit();
             } else {
-                setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL);
+                setpriority(PRIO_PROCESS, 0, mPreviousPriority);
+                androidSetThreadSchedulingGroup(0, mPreviousSchedulingGroup);
             }
         }
     }
@@ -408,7 +414,8 @@
         if (t != 0) {
             t->requestExit();
         } else {
-            setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL);
+            setpriority(PRIO_PROCESS, 0, mPreviousPriority);
+            androidSetThreadSchedulingGroup(0, mPreviousSchedulingGroup);
         }
     }