diff --git a/services/audioflinger/FastMixer.cpp b/services/audioflinger/FastMixer.cpp
index c4a0c0d..c10fa05 100644
--- a/services/audioflinger/FastMixer.cpp
+++ b/services/audioflinger/FastMixer.cpp
@@ -138,6 +138,8 @@
 
 void FastMixer::onStateChange()
 {
+    // log that audio was turned on/off
+    LOG_AUDIO_STATE();
     const FastMixerState * const current = (const FastMixerState *) mCurrent;
     const FastMixerState * const previous = (const FastMixerState *) mPrevious;
     FastMixerDumpState * const dumpState = (FastMixerDumpState *) mDumpState;
diff --git a/services/audioflinger/TypedLogger.h b/services/audioflinger/TypedLogger.h
index 83aa6a1..909af09 100644
--- a/services/audioflinger/TypedLogger.h
+++ b/services/audioflinger/TypedLogger.h
@@ -88,7 +88,11 @@
 
 // Write histogram timestamp entry
 #define LOG_HIST_TS() do { NBLog::Writer *x = tlNBLogWriter; if (x != nullptr) \
-                                x->logHistTS(hash(__FILE__, __LINE__)); } while(0)
+        x->logEventHistTs(NBLog::EVENT_HISTOGRAM_ENTRY_TS, hash(__FILE__, __LINE__)); } while(0)
+
+// Record that audio was turned on/off
+#define LOG_AUDIO_STATE() do { NBLog::Writer *x = tlNBLogWriter; if (x != nullptr) \
+        x->logEventHistTs(NBLog::EVENT_AUDIO_STATE, hash(__FILE__, __LINE__)); } while(0)
 
 namespace android {
 extern "C" {