diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Descriptor.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Descriptor.aidl
index 0baac3d..82dae97 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Descriptor.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Descriptor.aidl
@@ -36,20 +36,22 @@
 parcelable Descriptor {
   android.hardware.audio.effect.Descriptor.Common common;
   android.hardware.audio.effect.Capability capability;
-  const String EFFECT_TYPE_UUID_ENV_REVERB = "c2e5d5f0-94bd-4763-9cac-4e234d06839e";
-  const String EFFECT_TYPE_UUID_PRESET_REVERB = "47382d60-ddd8-11db-bf3a-0002a5d5c51b";
-  const String EFFECT_TYPE_UUID_EQUALIZER = "0bed4300-ddd6-11db-8f34-0002a5d5c51b";
-  const String EFFECT_TYPE_UUID_BASS_BOOST = "0634f220-ddd4-11db-a0fc-0002a5d5c51b";
-  const String EFFECT_TYPE_UUID_VIRTUALIZER = "37cc2c00-dddd-11db-8577-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_AEC = "7b491460-8d4d-11e0-bd61-0002a5d5c51b";
   const String EFFECT_TYPE_UUID_AGC1 = "0a8abfe0-654c-11e0-ba26-0002a5d5c51b";
   const String EFFECT_TYPE_UUID_AGC2 = "ae3c653b-be18-4ab8-8938-418f0a7f06ac";
-  const String EFFECT_TYPE_UUID_AEC = "7b491460-8d4d-11e0-bd61-0002a5d5c51b";
-  const String EFFECT_TYPE_UUID_NS = "58b4b260-8e06-11e0-aa8e-0002a5d5c51b";
-  const String EFFECT_TYPE_UUID_LOUDNESS_ENHANCER = "fe3199be-aed0-413f-87bb-11260eb63cf1";
+  const String EFFECT_TYPE_UUID_BASS_BOOST = "0634f220-ddd4-11db-a0fc-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_DOWNMIX = "381e49cc-a858-4aa2-87f6-e8388e7601b2";
   const String EFFECT_TYPE_UUID_DYNAMICS_PROCESSING = "7261676f-6d75-7369-6364-28e2fd3ac39e";
+  const String EFFECT_TYPE_UUID_ENV_REVERB = "c2e5d5f0-94bd-4763-9cac-4e234d06839e";
+  const String EFFECT_TYPE_UUID_EQUALIZER = "0bed4300-ddd6-11db-8f34-0002a5d5c51b";
   const String EFFECT_TYPE_UUID_HAPTIC_GENERATOR = "1411e6d6-aecd-4021-a1cf-a6aceb0d71e5";
+  const String EFFECT_TYPE_UUID_LOUDNESS_ENHANCER = "fe3199be-aed0-413f-87bb-11260eb63cf1";
+  const String EFFECT_TYPE_UUID_NS = "58b4b260-8e06-11e0-aa8e-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_PRESET_REVERB = "47382d60-ddd8-11db-bf3a-0002a5d5c51b";
   const String EFFECT_TYPE_UUID_SPATIALIZER = "ccd4cf09-a79d-46c2-9aae-06a1698d6c8f";
-  const String EFFECT_TYPE_UUID_VOLUME = "09e8ede0-ddde-11db-b4f6-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_VIRTUALIZER = "37cc2c00-dddd-11db-8577-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_VISUALIZER = "d069d9e0-8329-11df-9168-0002a5d5c51b";
+  const String EFFECT_TYPE_UUID_VOLUME = "fa81a2b8-588b-11ed-9b6a-0242ac120002";
   @VintfStability
   parcelable Identity {
     android.media.audio.common.AudioUuid type;
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
index b50a2f1..0422bd9 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
@@ -38,6 +38,7 @@
   android.media.audio.common.AudioDeviceDescription[] deviceDescription;
   android.media.audio.common.AudioMode mode;
   android.media.audio.common.AudioSource source;
+  boolean offload;
   android.hardware.audio.effect.Parameter.VolumeStereo volumeStereo;
   android.hardware.audio.effect.Parameter.Specific specific;
   @VintfStability
diff --git a/audio/aidl/android/hardware/audio/effect/Descriptor.aidl b/audio/aidl/android/hardware/audio/effect/Descriptor.aidl
index 01ca1c6..2fbc401 100644
--- a/audio/aidl/android/hardware/audio/effect/Descriptor.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Descriptor.aidl
@@ -37,25 +37,10 @@
      * UUID for effect types, these definitions are in sync with SDK, see @c AudioEffect.java.
      */
     /**
-     * UUID for environmental reverberation effect type.
+     * UUID for Acoustic Echo Canceler (AEC) type.
      */
-    const String EFFECT_TYPE_UUID_ENV_REVERB = "c2e5d5f0-94bd-4763-9cac-4e234d06839e";
-    /**
-     * UUID for preset reverberation effect type.
-     */
-    const String EFFECT_TYPE_UUID_PRESET_REVERB = "47382d60-ddd8-11db-bf3a-0002a5d5c51b";
-    /**
-     * UUID for equalizer effect type.
-     */
-    const String EFFECT_TYPE_UUID_EQUALIZER = "0bed4300-ddd6-11db-8f34-0002a5d5c51b";
-    /**
-     * UUID for bass boost effect type.
-     */
-    const String EFFECT_TYPE_UUID_BASS_BOOST = "0634f220-ddd4-11db-a0fc-0002a5d5c51b";
-    /**
-     * UUID for virtualizer effect type.
-     */
-    const String EFFECT_TYPE_UUID_VIRTUALIZER = "37cc2c00-dddd-11db-8577-0002a5d5c51b";
+    const String EFFECT_TYPE_UUID_AEC = "7b491460-8d4d-11e0-bd61-0002a5d5c51b";
+
     /**
      * UUID for Automatic Gain Control V1 (AGC1) type.
      */
@@ -65,33 +50,57 @@
      */
     const String EFFECT_TYPE_UUID_AGC2 = "ae3c653b-be18-4ab8-8938-418f0a7f06ac";
     /**
-     * UUID for Acoustic Echo Canceler (AEC) type.
+     * UUID for bass boost effect type.
      */
-    const String EFFECT_TYPE_UUID_AEC = "7b491460-8d4d-11e0-bd61-0002a5d5c51b";
+    const String EFFECT_TYPE_UUID_BASS_BOOST = "0634f220-ddd4-11db-a0fc-0002a5d5c51b";
     /**
-     * UUID for Noise Suppressor (NS) type.
+     * UUID for downmix effect type.
      */
-    const String EFFECT_TYPE_UUID_NS = "58b4b260-8e06-11e0-aa8e-0002a5d5c51b";
-    /**
-     * UUID for Loudness Enhancer type.
-     */
-    const String EFFECT_TYPE_UUID_LOUDNESS_ENHANCER = "fe3199be-aed0-413f-87bb-11260eb63cf1";
+    const String EFFECT_TYPE_UUID_DOWNMIX = "381e49cc-a858-4aa2-87f6-e8388e7601b2";
     /**
      * UUID for Dynamics Processing type.
      */
     const String EFFECT_TYPE_UUID_DYNAMICS_PROCESSING = "7261676f-6d75-7369-6364-28e2fd3ac39e";
     /**
+     * UUID for environmental reverberation effect type.
+     */
+    const String EFFECT_TYPE_UUID_ENV_REVERB = "c2e5d5f0-94bd-4763-9cac-4e234d06839e";
+    /**
+     * UUID for equalizer effect type.
+     */
+    const String EFFECT_TYPE_UUID_EQUALIZER = "0bed4300-ddd6-11db-8f34-0002a5d5c51b";
+    /**
      * UUID for Haptic Generator type.
      */
     const String EFFECT_TYPE_UUID_HAPTIC_GENERATOR = "1411e6d6-aecd-4021-a1cf-a6aceb0d71e5";
     /**
+     * UUID for Loudness Enhancer type.
+     */
+    const String EFFECT_TYPE_UUID_LOUDNESS_ENHANCER = "fe3199be-aed0-413f-87bb-11260eb63cf1";
+    /**
+     * UUID for Noise Suppressor (NS) type.
+     */
+    const String EFFECT_TYPE_UUID_NS = "58b4b260-8e06-11e0-aa8e-0002a5d5c51b";
+    /**
+     * UUID for preset reverberation effect type.
+     */
+    const String EFFECT_TYPE_UUID_PRESET_REVERB = "47382d60-ddd8-11db-bf3a-0002a5d5c51b";
+    /**
      * UUID for Spatializer type.
      */
     const String EFFECT_TYPE_UUID_SPATIALIZER = "ccd4cf09-a79d-46c2-9aae-06a1698d6c8f";
     /**
-     * UUID for Volume type. The volume effect is used for automated tests only.
+     * UUID for virtualizer effect type.
      */
-    const String EFFECT_TYPE_UUID_VOLUME = "09e8ede0-ddde-11db-b4f6-0002a5d5c51b";
+    const String EFFECT_TYPE_UUID_VIRTUALIZER = "37cc2c00-dddd-11db-8577-0002a5d5c51b";
+    /**
+     * UUID for visualizer effect type.
+     */
+    const String EFFECT_TYPE_UUID_VISUALIZER = "d069d9e0-8329-11df-9168-0002a5d5c51b";
+    /**
+     * UUID for Volume effect type.
+     */
+    const String EFFECT_TYPE_UUID_VOLUME = "fa81a2b8-588b-11ed-9b6a-0242ac120002";
 
     /**
      * This structure completely identifies an effect implementation.
diff --git a/audio/aidl/android/hardware/audio/effect/Flags.aidl b/audio/aidl/android/hardware/audio/effect/Flags.aidl
index 1612234..28685c3 100644
--- a/audio/aidl/android/hardware/audio/effect/Flags.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Flags.aidl
@@ -112,31 +112,31 @@
     HardwareAccelerator hwAcceleratorMode = HardwareAccelerator.NONE;
 
     /**
-     * Effect instance set this flag to true if it requires update on if the playback thread the
-     * effect attached to is offloaded or not. In this case the framework must call
+     * Effect instance sets this flag to true if it requires updates on whether the playback thread
+     * the effect is attached to is offloaded or not.  In this case the framework must call
      * IEffect.setParameter(Parameter.offload) to notify effect instance when playback thread
      * offload changes.
      */
     boolean offloadIndication;
 
     /**
-     * Effect instance set this flag to true if it requires device change update. In this case the
+     * Effect instance sets this flag to true if it requires device change update. In this case the
      * framework must call IEffect.setParameter(Parameter.device) to notify effect instance when the
      * device changes.
      */
     boolean deviceIndication;
 
     /**
-     * Effect instance set this flag to true if it requires audio mode change update. In this case
+     * Effect instance sets this flag to true if it requires audio mode change update. In this case
      * the framework must call IEffect.setParameter(Parameter.mode) to notify effect instance when
      * the audio mode changes.
      */
     boolean audioModeIndication;
 
     /**
-     * Effect instance set this flag to true if it requires audio source change update. In this case
-     * the framework must call IEffect.setParameter(Parameter.source) to notify effect instance when
-     * the audio source changes.
+     * Effect instance sets this flag to true if it requires audio source change update. In this
+     * case the framework must call IEffect.setParameter(Parameter.source) to notify effect instance
+     * when the audio source changes.
      */
     boolean audioSourceIndication;
 
diff --git a/audio/aidl/android/hardware/audio/effect/Parameter.aidl b/audio/aidl/android/hardware/audio/effect/Parameter.aidl
index 229c621..0954055 100644
--- a/audio/aidl/android/hardware/audio/effect/Parameter.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Parameter.aidl
@@ -135,11 +135,13 @@
      * Effect must implement setParameter(deviceDescription) if Flags.deviceIndication set to true.
      */
     AudioDeviceDescription[] deviceDescription;
+
     /**
      * Used by audio framework to set the audio mode to effect engine.
      * Effect must implement setParameter(mode) if Flags.audioModeIndication set to true.
      */
     AudioMode mode;
+
     /**
      * Used by audio framework to set the audio source to effect engine.
      * Effect must implement setParameter(source) if Flags.audioSourceIndication set to true.
@@ -147,6 +149,12 @@
     AudioSource source;
 
     /**
+     * Used by audio framework to indicate whether the playback thread the effect is attached to is
+     * offloaded or not.
+     */
+    boolean offload;
+
+    /**
      * The volume gain for left and right channel, left and right equals to same value if it's mono.
      */
     @VintfStability