diff --git a/etc/audio_policy_configuration.xml b/etc/audio_policy_configuration.xml
index c94718e..fec99cc 100644
--- a/etc/audio_policy_configuration.xml
+++ b/etc/audio_policy_configuration.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<!-- Copyright (C) 2015 The Android Open Source Project
+<!-- Copyright (C) 2019 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -15,15 +15,40 @@
 -->
 
 <audioPolicyConfiguration version="1.0" xmlns:xi="http://www.w3.org/2001/XInclude">
+    <!-- version section contains a “version” tag in the form “major.minor” e.g version=”1.0” -->
 
-    <globalConfiguration speaker_drc_enabled="false"/>
+    <!-- Global configuration Decalaration -->
+    <globalConfiguration speaker_drc_enabled="true"/>
 
+
+    <!-- Modules section:
+        There is one section per audio HW module present on the platform.
+        Each module section will contains two mandatory tags for audio HAL “halVersion” and “name”.
+        The module names are the same as in current .conf file:
+                “primary”, “A2DP”, “remote_submix”, “USB”
+        Each module will contain the following sections:
+        “devicePorts”: a list of device descriptors for all input and output devices accessible via this
+        module.
+        This contains both permanently attached devices and removable devices.
+        “mixPorts”: listing all output and input streams exposed by the audio HAL
+        “routes”: list of possible connections between input and output devices or between stream and
+        devices.
+            "route": is defined by an attribute:
+                -"type": <mux|mix> means all sources are mutual exclusive (mux) or can be mixed (mix)
+                -"sink": the sink involved in this route
+                -"sources": all the sources than can be connected to the sink via vis route
+        “attachedDevices”: permanently attached devices.
+        The attachedDevices section is a list of devices names. The names correspond to device names
+        defined in <devicePorts> section.
+        “defaultOutputDevice”: device to be used by default when no policy rule applies
+    -->
     <modules>
         <!-- Primary Audio HAL -->
-        <module name="primary" halVersion="2.0">
+        <module name="primary" halVersion="3.0">
             <attachedDevices>
                 <item>Speaker</item>
                 <item>Built-In Mic</item>
+                <item>Echo Reference</item>
             </attachedDevices>
             <defaultOutputDevice>Speaker</defaultOutputDevice>
             <mixPorts>
@@ -36,10 +61,17 @@
                              samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
                              channelMasks="AUDIO_CHANNEL_IN_MONO"/>
                 </mixPort>
+                <mixPort name="echo reference" role="sink">
+                    <profile name="echo_reference" format="AUDIO_FORMAT_PCM_32_BIT"
+                             samplingRates="48000"
+                             channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+                </mixPort>
             </mixPorts>
             <devicePorts>
                 <!-- Output devices declaration, i.e. Sink DEVICE PORT -->
-                <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER">
+                <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address="">
+                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
+                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
                 </devicePort>
                 <devicePort tagName="Wired Headset" type="AUDIO_DEVICE_OUT_WIRED_HEADSET" role="sink">
                 </devicePort>
@@ -49,10 +81,6 @@
                 </devicePort>
                 <devicePort tagName="BT SCO Headset" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET" role="sink">
                 </devicePort>
-                <devicePort tagName="BT SCO Car Kit" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT" role="sink">
-                </devicePort>
-                <devicePort tagName="Aux Digital" type="AUDIO_DEVICE_OUT_AUX_DIGITAL" role="sink">
-                </devicePort>
 
                 <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">
                 </devicePort>
@@ -60,6 +88,11 @@
                 </devicePort>
                 <devicePort tagName="BT SCO Headset Mic" type="AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET" role="source">
                 </devicePort>
+                <devicePort tagName="Echo Reference" type="AUDIO_DEVICE_IN_ECHO_REFERENCE" role="source">
+                    <profile name="echo_reference" format="AUDIO_FORMAT_PCM_32_BIT"
+                             samplingRates="48000"
+                             channelMasks="AUDIO_CHANNEL_IN_STEREO"/>
+                </devicePort>
             </devicePorts>
             <!-- route declaration, i.e. list all available sources for a given sink -->
             <routes>
@@ -69,16 +102,14 @@
                        sources="primary output"/>
                 <route type="mix" sink="Wired Headphones"
                        sources="primary output"/>
-                <route type="mix" sink="Aux Digital"
-                       sources="primary output"/>
                 <route type="mix" sink="BT SCO"
                        sources="primary output"/>
                 <route type="mix" sink="BT SCO Headset"
                        sources="primary output"/>
-                <route type="mix" sink="BT SCO Car Kit"
-                       sources="primary output"/>
                 <route type="mix" sink="primary input"
                        sources="Built-In Mic,Wired Headset Mic,BT SCO Headset Mic"/>
+                <route type="mix" sink="echo reference"
+                       sources="Echo Reference"/>
             </routes>
 
         </module>