diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 315cbbc..f679751 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -351,6 +351,7 @@
             // Read the initial underruns because this field is never cleared by the fast mixer
             mObservedUnderruns = thread->getFastTrackUnderruns(i);
             thread->mFastTrackAvailMask &= ~(1 << i);
+            thread->mNBLogWriter->logf("new Track mName=%d mFastIndex=%d", mName, mFastIndex);
         }
     }
     ALOGV("Track constructor name %d, calling pid %d", mName,
@@ -360,6 +361,7 @@
 AudioFlinger::PlaybackThread::Track::~Track()
 {
     ALOGV("PlaybackThread::Track destructor");
+    // FIXME not sure if safe to log here, would need a lock on thread to do it
 }
 
 void AudioFlinger::PlaybackThread::Track::destroy()
@@ -569,7 +571,8 @@
     sp<ThreadBase> thread = mThread.promote();
     if (thread != 0) {
         Mutex::Autolock _l(thread->mLock);
-        thread->mNBLogWriter->logf("start mName=%d", mName);
+        thread->mNBLogWriter->logf("start mName=%d mFastIndex=%d caller=%d", mName, mFastIndex,
+                IPCThreadState::self()->getCallingPid());
         track_state state = mState;
         // here the track could be either new, or restarted
         // in both cases "unstop" the track
@@ -612,7 +615,8 @@
     sp<ThreadBase> thread = mThread.promote();
     if (thread != 0) {
         Mutex::Autolock _l(thread->mLock);
-        thread->mNBLogWriter->logf("stop mName=%d", mName);
+        thread->mNBLogWriter->logf("stop mName=%d mFastIndex=%d caller=%d", mName, mFastIndex,
+                IPCThreadState::self()->getCallingPid());
         track_state state = mState;
         if (state == RESUMING || state == ACTIVE || state == PAUSING || state == PAUSED) {
             // If the track is not active (PAUSED and buffers full), flush buffers
@@ -649,7 +653,8 @@
     sp<ThreadBase> thread = mThread.promote();
     if (thread != 0) {
         Mutex::Autolock _l(thread->mLock);
-        thread->mNBLogWriter->logf("pause mName=%d", mName);
+        thread->mNBLogWriter->logf("pause mName=%d mFastIndex=%d caller=%d", mName, mFastIndex,
+                IPCThreadState::self()->getCallingPid());
         if (mState == ACTIVE || mState == RESUMING) {
             mState = PAUSING;
             ALOGV("ACTIVE/RESUMING => PAUSING (%d) on thread %p", mName, thread.get());
@@ -673,7 +678,8 @@
     sp<ThreadBase> thread = mThread.promote();
     if (thread != 0) {
         Mutex::Autolock _l(thread->mLock);
-        thread->mNBLogWriter->logf("flush mName=%d", mName);
+        thread->mNBLogWriter->logf("flush mName=%d mFastIndex=%d caller=%d", mName, mFastIndex,
+                IPCThreadState::self()->getCallingPid());
         if (mState != STOPPING_1 && mState != STOPPING_2 && mState != STOPPED && mState != PAUSED &&
                 mState != PAUSING && mState != IDLE && mState != FLUSHED) {
             return;