diff --git a/services/audiopolicy/service/Spatializer.cpp b/services/audiopolicy/service/Spatializer.cpp
index b19d669..c199a76 100644
--- a/services/audiopolicy/service/Spatializer.cpp
+++ b/services/audiopolicy/service/Spatializer.cpp
@@ -519,9 +519,11 @@
         return binderStatusFromStatusT(INVALID_OPERATION);
     }
     std::lock_guard lock(mLock);
-    mHeadSensor = sensorHandle;
-    checkPoseController_l();
-    checkSensorsState_l();
+    if (mHeadSensor != sensorHandle) {
+        mHeadSensor = sensorHandle;
+        checkPoseController_l();
+        checkSensorsState_l();
+    }
     return Status::ok();
 }
 
@@ -531,8 +533,13 @@
         return binderStatusFromStatusT(INVALID_OPERATION);
     }
     std::lock_guard lock(mLock);
-    mScreenSensor = sensorHandle;
-    checkSensorsState_l();
+    if (mScreenSensor != sensorHandle) {
+        mScreenSensor = sensorHandle;
+        // TODO: consider a new method setHeadAndScreenSensor()
+        // because we generally set both at the same time.
+        // This will avoid duplicated work and recentering.
+        checkSensorsState_l();
+    }
     return Status::ok();
 }
 
diff --git a/services/audiopolicy/service/SpatializerPoseController.cpp b/services/audiopolicy/service/SpatializerPoseController.cpp
index 832f662..304d44a 100644
--- a/services/audiopolicy/service/SpatializerPoseController.cpp
+++ b/services/audiopolicy/service/SpatializerPoseController.cpp
@@ -149,6 +149,10 @@
 
 void SpatializerPoseController::setHeadSensor(int32_t sensor) {
     std::lock_guard lock(mMutex);
+    if (sensor == mHeadSensor) return;
+    ALOGV("%s: new sensor:%d  mHeadSensor:%d  mScreenSensor:%d",
+            __func__, sensor, mHeadSensor, mScreenSensor);
+
     // Stop current sensor, if valid and different from the other sensor.
     if (mHeadSensor != INVALID_SENSOR && mHeadSensor != mScreenSensor) {
         mPoseProvider->stopSensor(mHeadSensor);
@@ -179,11 +183,15 @@
         mHeadSensor = INVALID_SENSOR;
     }
 
-    mProcessor->recenter(true, false);
+    mProcessor->recenter(true /* recenterHead */, false /* recenterScreen */);
 }
 
 void SpatializerPoseController::setScreenSensor(int32_t sensor) {
     std::lock_guard lock(mMutex);
+    if (sensor == mScreenSensor) return;
+    ALOGV("%s: new sensor:%d  mHeadSensor:%d  mScreenSensor:%d",
+            __func__, sensor, mHeadSensor, mScreenSensor);
+
     // Stop current sensor, if valid and different from the other sensor.
     if (mScreenSensor != INVALID_SENSOR && mScreenSensor != mHeadSensor) {
         mPoseProvider->stopSensor(mScreenSensor);
@@ -212,7 +220,7 @@
         mScreenSensor = INVALID_SENSOR;
     }
 
-    mProcessor->recenter(false, true);
+    mProcessor->recenter(false /* recenterHead */, true /* recenterScreen */);
 }
 
 void SpatializerPoseController::setDesiredMode(HeadTrackingMode mode) {