diff --git a/groups/audio/audio_base_aaos/default/policy/audio_hal_configuration.xml b/groups/audio/audio_base_aaos/default/policy/audio_hal_configuration.xml
index 77a2cc568..0088c0d35 100644
--- a/groups/audio/audio_base_aaos/default/policy/audio_hal_configuration.xml
+++ b/groups/audio/audio_base_aaos/default/policy/audio_hal_configuration.xml
@@ -10,28 +10,19 @@
   <Stream Address="bus0_media_out" Direction="playback" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
   </Stream>
-  <Stream Address="bus1_navigation_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
-  <Stream Address="bus2_voice_command_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
   <Stream Address="bus3_call_ring_out" Direction="playback" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
   </Stream>
   <Stream Address="bus4_call_out" Direction="playback" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
   </Stream>
-  <Stream Address="bus5_alarm_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
-  <Stream Address="bus6_notification_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
-  <Stream Address="bus7_system_sound_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
   <Stream Address="Built-In Mic" Direction="capture" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000" Format="16" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
   </Stream>
+  <Stream Address="Built-In Back Mic" Direction="capture" Mmap="false">
+    <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
+  <Stream Address="bus_1000_input_zone_0" Direction="capture" Mmap="false">
+    <Pcm Card="SoundCard" Device="2" SampleRate="48000" Format="16" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
 </Streams>
diff --git a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_attached_devices.xml b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_attached_devices.xml
index 04aab60d0..8ef815a76 100644
--- a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_attached_devices.xml
+++ b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_attached_devices.xml
@@ -16,13 +16,8 @@
 <attachedDevices>
     <!-- One bus per context -->
     <item>bus0_media_out</item>
-    <item>bus1_navigation_out</item>
-    <item>bus2_voice_command_out</item>
     <item>bus3_call_ring_out</item>
     <item>bus4_call_out</item>
-    <item>bus5_alarm_out</item>
-    <item>bus6_notification_out</item>
-    <item>bus7_system_sound_out</item>
 
     <!-- TODO update for input-->
     <item>bus_1000_input_zone_0</item>
diff --git a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_devices.xml b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_devices.xml
index 3d7438697..5d84c5b43 100644
--- a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_devices.xml
+++ b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_devices.xml
@@ -25,26 +25,6 @@
                   defaultValueMB="0" stepValueMB="100"/>
             </gains>
     </devicePort>
-    <devicePort tagName="bus1_navigation_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus1_navigation_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
-    <devicePort tagName="bus2_voice_command_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus2_voice_command_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
     <devicePort tagName="bus3_call_ring_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
                 address="bus3_call_ring_out">
         <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
@@ -65,36 +45,6 @@
                   defaultValueMB="0" stepValueMB="100"/>
         </gains>
     </devicePort>
-    <devicePort tagName="bus5_alarm_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus5_alarm_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
-    <devicePort tagName="bus6_notification_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus6_notification_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
-    <devicePort tagName="bus7_system_sound_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus7_system_sound_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
 
     <!-- TODO update for input-->
     <devicePort tagName="bus_1000_input_zone_0" type="AUDIO_DEVICE_IN_BUS"
diff --git a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_mixports.xml b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_mixports.xml
index b1f3e7c81..099537b68 100644
--- a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_mixports.xml
+++ b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_mixports.xml
@@ -20,16 +20,6 @@
                  samplingRates="48000"
                  channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
         </mixPort>
-    <mixPort name="mixport_bus1_navigation_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
-    <mixPort name="mixport_bus2_voice_command_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
     <mixPort name="mixport_bus3_call_ring_out" role="source">
         <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
                  samplingRates="48000"
@@ -40,21 +30,6 @@
                  samplingRates="48000"
                  channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
     </mixPort>
-    <mixPort name="mixport_bus5_alarm_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
-    <mixPort name="mixport_bus6_notification_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
-    <mixPort name="mixport_bus7_system_sound_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
     <!-- TODO update for input-->
     <mixPort name="primary input" role="sink">
         <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
diff --git a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_routes.xml b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_routes.xml
index 52bdbf702..634812c7e 100644
--- a/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_routes.xml
+++ b/groups/audio/audio_base_aaos/default/policy/audio_policy_configuration_routes.xml
@@ -30,16 +30,8 @@
     <route type="mix" sink="mixport_bus_2000_input_zone_1" sources="bus_2000_input_zone_1"/>
 
     <route type="mix" sink="bus0_media_out" sources="mixport_bus0_media_out"/>
-    <route type="mix" sink="bus1_navigation_out" sources="mixport_bus1_navigation_out"/>
-    <route type="mix" sink="bus2_voice_command_out"
-           sources="mixport_bus2_voice_command_out"/>
     <route type="mix" sink="bus3_call_ring_out" sources="mixport_bus3_call_ring_out"/>
     <route type="mix" sink="bus4_call_out" sources="mixport_bus4_call_out"/>
-    <route type="mix" sink="bus5_alarm_out" sources="mixport_bus5_alarm_out"/>
-    <route type="mix" sink="bus6_notification_out"
-           sources="mixport_bus6_notification_out"/>
-    <route type="mix" sink="bus7_system_sound_out"
-           sources="mixport_bus7_system_sound_out"/>
 
     <!-- TODO update for input-->
     <route type="mix" sink="mixport_bus_1000_input_zone_0" sources="bus_1000_input_zone_0"/>
diff --git a/groups/audio/audio_base_aaos/default/policy/car_audio_configuration.xml b/groups/audio/audio_base_aaos/default/policy/car_audio_configuration.xml
index dfa2b18f8..c6e340f9d 100644
--- a/groups/audio/audio_base_aaos/default/policy/car_audio_configuration.xml
+++ b/groups/audio/audio_base_aaos/default/policy/car_audio_configuration.xml
@@ -29,40 +29,29 @@
                     <device address="bus0_media_out">
                         <context context="music"/>
                         <context context="announcement"/>
-                        <context context="call"/>
-                    </device>
-                    <device address="bus6_notification_out">
+                        <context context="alarm"/>
+                        <context context="system_sound"/>
+                        <context context="emergency"/>
+                        <context context="safety"/>
+                        <context context="vehicle_status"/>
                         <context context="notification"/>
-                    </device>
-                </group>
-                <group>
-                    <device address="bus1_navigation_out">
                         <context context="navigation"/>
-                    </device>
-                    <device address="bus2_voice_command_out">
                         <context context="voice_command"/>
                     </device>
                 </group>
                 <group>
                     <device address="bus3_call_ring_out">
                         <context context="call_ring"/>
-                    </device>
-                </group>
-                <group>
-                    <device address="bus5_alarm_out">
-                        <context context="alarm"/>
-                    </device>
-                    <device address="bus7_system_sound_out">
-                        <context context="system_sound"/>
-                        <context context="emergency"/>
-                        <context context="safety"/>
-                        <context context="vehicle_status"/>
-                    </device>
+		    </device>
+		    <device address="bus4_call_out">
+                        <context context="call"/>
+		    </device>
                 </group>
 	    </volumeGroups>
             <inputDevices>
 		<inputDevice address="bus_1000_input_zone_0"/>
 		<inputDevice address="Built-In Mic"/>
+		<inputDevice address="Built-In Back Mic"/>
             </inputDevices>
         </zone>
     </zones>
diff --git a/groups/multi-passenger/true/audio/audio_hal_configuration.xml b/groups/multi-passenger/true/audio/audio_hal_configuration.xml
index e55e34de6..2b5151b22 100644
--- a/groups/multi-passenger/true/audio/audio_hal_configuration.xml
+++ b/groups/multi-passenger/true/audio/audio_hal_configuration.xml
@@ -22,17 +22,11 @@
   <Stream Address="bus4_call_out" Direction="playback" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
   </Stream>
-  <Stream Address="bus5_alarm_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
-  <Stream Address="bus6_notification_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
-  <Stream Address="bus7_system_sound_out" Direction="playback" Mmap="false">
-    <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
-  </Stream>
   <Stream Address="Built-In Mic" Direction="capture" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+    <Stream Address="Built-In Back Mic" Direction="capture" Mmap="false">
+    <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
   </Stream>
   <Stream Address="bus_1000_input_zone_0" Direction="capture" Mmap="false">
     <Pcm Card="SoundCard" Device="1" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
@@ -43,4 +37,26 @@
   <Stream Address="bus_2000_input_zone_1" Direction="capture" Mmap="false">
     <Pcm Card="SoundCard" Device="2" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
   </Stream>
+
+  <!-- zone 2 -->
+  <Stream Address="bus200_audio_zone_2" Direction="playback" Mmap="false">
+    <Pcm Card="SoundCard" Device="3" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
+  <Stream Address="bus_3000_input_zone_2" Direction="capture" Mmap="false">
+    <Pcm Card="SoundCard" Device="3" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
+
+  <!-- zone 3 -->
+  <Stream Address="bus300_audio_zone_3" Direction="playback" Mmap="false">
+    <Pcm Card="SoundCard" Device="4" SampleRate="48000"  Format="32" Channels="2" PeriodSize="1024" PeriodCount="4" StartThreshhold="4096" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
+  <!--
+       there is only 3 capture pcm devices on SoundCard.
+       Based on the limitation, zone 3 uses the same capture pcm device with zone 2.
+       To be refined after a new design
+  -->
+  <Stream Address="bus_4000_input_zone_3" Direction="capture" Mmap="false">
+    <Pcm Card="SoundCard" Device="3" SampleRate="48000"  Format="32" Channels="2" PeriodSize="960" PeriodCount="4" StartThreshhold="1" StopThreshold="3840" AdditionalOutputDeviceDelay="5"/>
+  </Stream>
+
   </Streams>
diff --git a/groups/multi-passenger/true/audio/audio_policy_configuration_attached_devices.xml b/groups/multi-passenger/true/audio/audio_policy_configuration_attached_devices.xml
index 9bc1d3ff4..5e92b63c4 100644
--- a/groups/multi-passenger/true/audio/audio_policy_configuration_attached_devices.xml
+++ b/groups/multi-passenger/true/audio/audio_policy_configuration_attached_devices.xml
@@ -20,9 +20,6 @@
     <item>bus2_voice_command_out</item>
     <item>bus3_call_ring_out</item>
     <item>bus4_call_out</item>
-    <item>bus5_alarm_out</item>
-    <item>bus6_notification_out</item>
-    <item>bus7_system_sound_out</item>
 
     <!-- TODO update for input-->
     <item>bus_1000_input_zone_0</item>
@@ -42,4 +39,16 @@
 
     <!-- TODO update for input-->
     <item>bus_2000_input_zone_1</item>
+
+    <!-- zone 2 -->
+    <item>bus200_audio_zone_2</item>
+
+    <!-- TODO update for input-->
+    <item>bus_3000_input_zone_2</item>
+
+    <!-- zone 3 -->
+    <item>bus300_audio_zone_3</item>
+
+    <!-- TODO update for input-->
+    <item>bus_4000_input_zone_3</item>
 </attachedDevices>
diff --git a/groups/multi-passenger/true/audio/audio_policy_configuration_devices.xml b/groups/multi-passenger/true/audio/audio_policy_configuration_devices.xml
index ec68461ab..dd7f0d730 100644
--- a/groups/multi-passenger/true/audio/audio_policy_configuration_devices.xml
+++ b/groups/multi-passenger/true/audio/audio_policy_configuration_devices.xml
@@ -14,7 +14,7 @@
      limitations under the License.
 -->
 <devicePorts>
-    <!-- zone 1 -->
+    <!-- primary zone -->
     <devicePort tagName="bus0_media_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
                 address="bus0_media_out">
         <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
@@ -65,36 +65,6 @@
                   defaultValueMB="0" stepValueMB="100"/>
         </gains>
     </devicePort>
-    <devicePort tagName="bus5_alarm_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus5_alarm_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
-    <devicePort tagName="bus6_notification_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus6_notification_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
-    <devicePort tagName="bus7_system_sound_out" role="sink" type="AUDIO_DEVICE_OUT_BUS"
-                address="bus7_system_sound_out">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-        <gains>
-            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
-                  minValueMB="-3200" maxValueMB="600"
-                  defaultValueMB="0" stepValueMB="100"/>
-        </gains>
-    </devicePort>
 
     <!-- TODO update for input-->
     <devicePort tagName="bus_1000_input_zone_0" type="AUDIO_DEVICE_IN_BUS"
@@ -127,7 +97,7 @@
                  channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO AUDIO_CHANNEL_IN_FRONT_BACK"/>
     </devicePort>
 
-    <!-- zone 2 -->
+    <!-- zone 1 -->
     <devicePort tagName="bus100_audio_zone_1" role="sink" type="AUDIO_DEVICE_OUT_BUS"
                 address="bus100_audio_zone_1">
         <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
@@ -232,4 +202,54 @@
                   defaultValueMB="0" stepValueMB="100"/>
         </gains>
     </devicePort>
+
+    <!-- zone 2 -->
+    <devicePort tagName="bus200_audio_zone_2" role="sink" type="AUDIO_DEVICE_OUT_BUS"
+                address="bus200_audio_zone_2">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        <gains>
+            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
+                  minValueMB="-3200" maxValueMB="600"
+                  defaultValueMB="0" stepValueMB="100"/>
+            </gains>
+    </devicePort>
+
+    <!-- TODO update for input-->
+    <devicePort tagName="bus_3000_input_zone_2" type="AUDIO_DEVICE_IN_BUS"
+                role="source" address="bus_3000_input_zone_2">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+        <gains>
+            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
+                  minValueMB="-3200" maxValueMB="600"
+                  defaultValueMB="0" stepValueMB="100"/>
+        </gains>
+    </devicePort>
+
+    <!-- zone 3 -->
+    <devicePort tagName="bus300_audio_zone_3" role="sink" type="AUDIO_DEVICE_OUT_BUS"
+                address="bus300_audio_zone_3">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+        <gains>
+            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
+                  minValueMB="-3200" maxValueMB="600"
+                  defaultValueMB="0" stepValueMB="100"/>
+            </gains>
+    </devicePort>
+
+    <!-- TODO update for input-->
+    <devicePort tagName="bus_4000_input_zone_3" type="AUDIO_DEVICE_IN_BUS"
+                role="source" address="bus_4000_input_zone_3">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+        <gains>
+            <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
+                  minValueMB="-3200" maxValueMB="600"
+                  defaultValueMB="0" stepValueMB="100"/>
+        </gains>
+    </devicePort>
 </devicePorts>
diff --git a/groups/multi-passenger/true/audio/audio_policy_configuration_mixports.xml b/groups/multi-passenger/true/audio/audio_policy_configuration_mixports.xml
index f64850427..dd08450a4 100644
--- a/groups/multi-passenger/true/audio/audio_policy_configuration_mixports.xml
+++ b/groups/multi-passenger/true/audio/audio_policy_configuration_mixports.xml
@@ -40,21 +40,6 @@
                  samplingRates="48000"
                  channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
     </mixPort>
-    <mixPort name="mixport_bus5_alarm_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
-    <mixPort name="mixport_bus6_notification_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
-    <mixPort name="mixport_bus7_system_sound_out" role="source">
-        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
-                 samplingRates="48000"
-                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
-    </mixPort>
     <!-- TODO update for input-->
     <mixPort name="primary input" role="sink">
         <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
@@ -121,4 +106,32 @@
                  samplingRates="48000"
                  channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
     </mixPort>
+
+    <!-- zone 2 -->
+    <mixPort name="mixport_bus200_audio_zone_2" role="source"
+             flags="AUDIO_OUTPUT_FLAG_PRIMARY">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+    </mixPort>
+    <!-- TODO update for input-->
+    <mixPort name="mixport_bus_3000_input_zone_2" role="sink">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+    </mixPort>
+
+    <!-- zone 3 -->
+    <mixPort name="mixport_bus300_audio_zone_3" role="source"
+             flags="AUDIO_OUTPUT_FLAG_PRIMARY">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
+    </mixPort>
+    <!-- TODO update for input-->
+    <mixPort name="mixport_bus_4000_input_zone_3" role="sink">
+        <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
+                 samplingRates="48000"
+                 channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+    </mixPort>
 </mixPorts>
diff --git a/groups/multi-passenger/true/audio/audio_policy_configuration_routes.xml b/groups/multi-passenger/true/audio/audio_policy_configuration_routes.xml
index e135070f0..1801a7800 100644
--- a/groups/multi-passenger/true/audio/audio_policy_configuration_routes.xml
+++ b/groups/multi-passenger/true/audio/audio_policy_configuration_routes.xml
@@ -36,14 +36,22 @@
            sources="mixport_bus2_voice_command_out"/>
     <route type="mix" sink="bus3_call_ring_out" sources="mixport_bus3_call_ring_out"/>
     <route type="mix" sink="bus4_call_out" sources="mixport_bus4_call_out"/>
-    <route type="mix" sink="bus5_alarm_out" sources="mixport_bus5_alarm_out"/>
-    <route type="mix" sink="bus6_notification_out"
-           sources="mixport_bus6_notification_out"/>
-    <route type="mix" sink="bus7_system_sound_out"
-           sources="mixport_bus7_system_sound_out"/>
 
     <!-- TODO update for input-->
     <route type="mix" sink="mixport_bus_1000_input_zone_0" sources="bus_1000_input_zone_0"/>
     <route type="mix" sink="primary input"
            sources="Built-In Mic,Built-In Back Mic,Echo-Reference Mic"/>
+
+    <!-- zone 2 -->
+    <route type="mix" sink="bus200_audio_zone_2" sources="mixport_bus200_audio_zone_2"/>
+
+    <!-- TODO update for input-->
+    <route type="mix" sink="mixport_bus_3000_input_zone_2" sources="bus_3000_input_zone_2"/>
+
+    <!-- zone 3 -->
+    <route type="mix" sink="bus300_audio_zone_3" sources="mixport_bus300_audio_zone_3"/>
+
+    <!-- TODO update for input-->
+    <route type="mix" sink="mixport_bus_4000_input_zone_3" sources="bus_4000_input_zone_3"/>
+
 </routes>
diff --git a/groups/multi-passenger/true/audio/car_audio_configuration.xml b/groups/multi-passenger/true/audio/car_audio_configuration.xml
index 9a103cb89..870e167a1 100644
--- a/groups/multi-passenger/true/audio/car_audio_configuration.xml
+++ b/groups/multi-passenger/true/audio/car_audio_configuration.xml
@@ -29,9 +29,11 @@
                     <device address="bus0_media_out">
                         <context context="music"/>
                         <context context="announcement"/>
-                        <context context="call"/>
-                    </device>
-                    <device address="bus6_notification_out">
+                        <context context="alarm"/>
+                        <context context="system_sound"/>
+                        <context context="emergency"/>
+                        <context context="safety"/>
+                        <context context="vehicle_status"/>
                         <context context="notification"/>
                     </device>
                 </group>
@@ -46,23 +48,16 @@
                 <group>
                     <device address="bus3_call_ring_out">
                         <context context="call_ring"/>
-                    </device>
-                </group>
-                <group>
-                    <device address="bus5_alarm_out">
-                        <context context="alarm"/>
-                    </device>
-                    <device address="bus7_system_sound_out">
-                        <context context="system_sound"/>
-                        <context context="emergency"/>
-                        <context context="safety"/>
-                        <context context="vehicle_status"/>
+		    </device>
+		    <device address="bus4_call_out">
+                        <context context="call"/>
                     </device>
                 </group>
 	    </volumeGroups>
             <inputDevices>
 		<inputDevice address="bus_1000_input_zone_0"/>
 		<inputDevice address="Built-In Mic"/>
+		<inputDevice address="Built-In Back Mic"/>
             </inputDevices>
          </zone>
       <zone name="front passenger zone 1" audioZoneId="1" occupantZoneId="1">
@@ -87,7 +82,53 @@
           <inputDevices>
              <inputDevice address="bus_2000_input_zone_1"/>
           </inputDevices>
-       </zone>
+      </zone>
+      <zone name="back passenger zone 2" audioZoneId="2" occupantZoneId="2">
+          <volumeGroups>
+              <group>
+                  <device address="bus200_audio_zone_2">
+                      <context context="music"/>
+                      <context context="navigation"/>
+                      <context context="voice_command"/>
+                      <context context="call_ring"/>
+                      <context context="call"/>
+                      <context context="alarm"/>
+                      <context context="notification"/>
+                      <context context="system_sound"/>
+                      <context context="emergency"/>
+                      <context context="safety"/>
+                      <context context="vehicle_status"/>
+                      <context context="announcement"/>
+                  </device>
+              </group>
+          </volumeGroups>
+          <inputDevices>
+              <inputDevice address="bus_3000_input_zone_2"/>
+          </inputDevices>
+      </zone>
+      <zone name="back passenger zone 3" audioZoneId="3" occupantZoneId="3">
+          <volumeGroups>
+              <group>
+                  <device address="bus300_audio_zone_3">
+                      <context context="music"/>
+                      <context context="navigation"/>
+                      <context context="voice_command"/>
+                      <context context="call_ring"/>
+                      <context context="call"/>
+                      <context context="alarm"/>
+                      <context context="notification"/>
+                      <context context="system_sound"/>
+                      <context context="emergency"/>
+                      <context context="safety"/>
+                      <context context="vehicle_status"/>
+                      <context context="announcement"/>
+                  </device>
+              </group>
+          </volumeGroups>
+          <inputDevices>
+              <inputDevice address="bus_4000_input_zone_3"/>
+          </inputDevices>
+      </zone>
     </zones>
 </carAudioConfiguration>
 
diff --git a/groups/multi-passenger/true/product.mk b/groups/multi-passenger/true/product.mk
index 5bf0e98b0..a432b88f5 100644
--- a/groups/multi-passenger/true/product.mk
+++ b/groups/multi-passenger/true/product.mk
@@ -31,7 +31,7 @@ PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/audio/audio_policy_configuration_mixports.xml:vendor/etc/audio_policy_configuration_mixports.xml \
     $(LOCAL_PATH)/audio/audio_policy_configuration_routes.xml:vendor/etc/audio_policy_configuration_routes.xml \
     $(LOCAL_PATH)/audio/audio_hal_configuration.xml:vendor/etc/audio_hal_configuration.xml \
-    $(LOCAL_PATH)/audio/audio_hal_configuration_intel_poc.xml:vendor/etc/audio_hal_configuration_intel_poc.xml 
+    $(LOCAL_PATH)/audio/audio_hal_configuration_intel_poc.xml:vendor/etc/audio_hal_configuration_intel_poc.xml
 endif
 
 PRODUCT_COPY_FILES += \