diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index d18499e2f6d91..f1768b9e2c5b3 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -1337,12 +1337,8 @@ public class AudioManager {
     public void setVolumeIndexForAttributes(@NonNull AudioAttributes attr, int index, int flags) {
         Preconditions.checkNotNull(attr, "attr must not be null");
         final IAudioService service = getService();
-        try {
-            service.setVolumeIndexForAttributes(attr, index, flags,
-                    getContext().getOpPackageName(), getContext().getAttributionTag());
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
+        int groupId = getVolumeGroupIdForAttributes(attr);
+        setVolumeGroupVolumeIndex(groupId, index, flags);
     }
 
     /**
@@ -1361,11 +1357,8 @@ public class AudioManager {
     public int getVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
         Preconditions.checkNotNull(attr, "attr must not be null");
         final IAudioService service = getService();
-        try {
-            return service.getVolumeIndexForAttributes(attr);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
+        int groupId = getVolumeGroupIdForAttributes(attr);
+        return getVolumeGroupVolumeIndex(groupId);
     }
 
     /**
@@ -1382,11 +1375,8 @@ public class AudioManager {
     public int getMaxVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
         Preconditions.checkNotNull(attr, "attr must not be null");
         final IAudioService service = getService();
-        try {
-            return service.getMaxVolumeIndexForAttributes(attr);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
+        int groupId = getVolumeGroupIdForAttributes(attr);
+        return getVolumeGroupMaxVolumeIndex(groupId);
     }
 
     /**
@@ -1402,9 +1392,169 @@ public class AudioManager {
     @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
     public int getMinVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
         Preconditions.checkNotNull(attr, "attr must not be null");
+        final IAudioService service = getService();
+        int groupId = getVolumeGroupIdForAttributes(attr);
+        return getVolumeGroupMinVolumeIndex(groupId);
+    }
+
+    /**
+     * Returns the volume group id associated to the given {@link AudioAttributes}.
+     *
+     * @param attributes The {@link AudioAttributes} to consider.
+     * @return {@link android.media.audiopolicy.AudioVolumeGroup} id supporting the given
+     * {@link AudioAttributes} if found,
+     * {@code android.media.audiopolicy.AudioVolumeGroup.DEFAULT_VOLUME_GROUP} otherwise.
+     * @hide
+     */
+    public int getVolumeGroupIdForAttributes(@NonNull AudioAttributes attributes) {
+        Preconditions.checkNotNull(attributes, "Audio Attributes must not be null");
+        return AudioProductStrategy.getVolumeGroupIdForAudioAttributes(attributes,
+                /* fallbackOnDefault= */ false);
+    }
+
+    /**
+     * Sets the volume index for a particular group associated to given id.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @param index The volume index to set. See
+     *          {@link #getVolumeGroupMaxVolumeIndex(id)} for the largest valid value
+     *          {@link #getVolumeGroupMinVolumeIndex(id)} for the lowest valid value.
+     * @param flags One or more flags.
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
+    public void setVolumeGroupVolumeIndex(int groupId, int index, int flags) {
         final IAudioService service = getService();
         try {
-            return service.getMinVolumeIndexForAttributes(attr);
+            service.setVolumeGroupVolumeIndex(groupId, index, flags,
+                    getContext().getOpPackageName(), getContext().getAttributionTag());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Returns the current volume index for a particular group associated to given id.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @return The current volume index for the stream.
+     * @hide
+     */
+    @IntRange(from = 0)
+    @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
+    public int getVolumeGroupVolumeIndex(int groupId) {
+        final IAudioService service = getService();
+        try {
+            return service.getVolumeGroupVolumeIndex(groupId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Returns the maximum volume index for a particular group associated to given id.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @return The maximum valid volume index for the {@link AudioAttributes}.
+     * @hide
+     */
+    @IntRange(from = 0)
+    @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
+    public int getVolumeGroupMaxVolumeIndex(int groupId) {
+        final IAudioService service = getService();
+        try {
+            return service.getVolumeGroupMaxVolumeIndex(groupId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Returns the minimum volume index for a particular group associated to given id.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @return The minimum valid volume index for the {@link AudioAttributes}.
+     * @hide
+     */
+    @IntRange(from = 0)
+    @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
+    public int getVolumeGroupMinVolumeIndex(int groupId) {
+        final IAudioService service = getService();
+        try {
+            return service.getVolumeGroupMinVolumeIndex(groupId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Adjusts the volume of a particular group associated to given id by one step in a direction.
+     * <p> If the volume group is associated to a stream type, it fallbacks on
+     * {@link AudioManager#adjustStreamVolume()} for compatibility reason.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @param direction The direction to adjust the volume. One of
+     *            {@link #ADJUST_LOWER}, {@link #ADJUST_RAISE}, or
+     *            {@link #ADJUST_SAME}.
+     * @param flags One or more flags.
+     * @throws SecurityException if the adjustment triggers a Do Not Disturb change and the caller
+     * is not granted notification policy access.
+     * @hide
+     */
+    public void adjustVolumeGroupVolume(int groupId, int direction, int flags) {
+        IAudioService service = getService();
+        try {
+            service.adjustVolumeGroupVolume(groupId, direction, flags,
+                    getContext().getOpPackageName());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Get last audible volume of the group associated to given id before it was muted.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @return current volume if not muted, volume before muted otherwise.
+     * @hide
+     */
+    @RequiresPermission("android.permission.QUERY_AUDIO_STATE")
+    @IntRange(from = 0)
+    public int getLastAudibleVolumeGroupVolume(int groupId) {
+        IAudioService service = getService();
+        try {
+            return service.getLastAudibleVolumeGroupVolume(groupId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Returns the current mute state for a particular volume group associated to the given id.
+     * <p> Call first in prior {@link getVolumeGroupIdForAttributes} to retrieve the volume group
+     * id supporting the given {@link AudioAttributes}.
+     *
+     * @param groupId of the {@link android.media.audiopolicy.AudioVolumeGroup} to consider.
+     * @return The mute state for the given {@link android.media.audiopolicy.AudioVolumeGroup} id.
+     * @see #adjustAttributesVolume(AudioAttributes, int, int)
+     * @hide
+     */
+    public boolean isVolumeGroupMuted(int groupId) {
+        IAudioService service = getService();
+        try {
+            return service.isVolumeGroupMuted(groupId);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
diff --git a/media/java/android/media/IAudioService.aidl b/media/java/android/media/IAudioService.aidl
index aa2e0ba6e911a..73dbfa8b4bddd 100644
--- a/media/java/android/media/IAudioService.aidl
+++ b/media/java/android/media/IAudioService.aidl
@@ -127,14 +127,20 @@ interface IAudioService {
 
     List<AudioVolumeGroup> getAudioVolumeGroups();
 
-    void setVolumeIndexForAttributes(in AudioAttributes aa, int index, int flags,
-            String callingPackage, in String attributionTag);
+    void setVolumeGroupVolumeIndex(int groupId, int index, int flags, String callingPackage,
+            in String attributionTag);
 
-    int getVolumeIndexForAttributes(in AudioAttributes aa);
+    int getVolumeGroupVolumeIndex(int groupId);
 
-    int getMaxVolumeIndexForAttributes(in AudioAttributes aa);
+    int getVolumeGroupMaxVolumeIndex(int groupId);
 
-    int getMinVolumeIndexForAttributes(in AudioAttributes aa);
+    int getVolumeGroupMinVolumeIndex(int groupId);
+
+    int getLastAudibleVolumeGroupVolume(int groupId);
+
+    boolean isVolumeGroupMuted(int groupId);
+
+    void adjustVolumeGroupVolume(int groupId, int direction, int flags, String callingPackage);
 
     int getLastAudibleStreamVolume(int streamType);
 
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index 936f295b20fe8..9534e701753bb 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -3667,20 +3667,17 @@ public class AudioService extends IAudioService.Stub
     }
 
 
-    /** @see AudioManager#setVolumeIndexForAttributes(attr, int, int) */
-    public void setVolumeIndexForAttributes(@NonNull AudioAttributes attr, int index, int flags,
+    /** @see AudioManager#setVolumeGroupVolumeIndex(int, int, int) */
+    public void setVolumeGroupVolumeIndex(int groupId, int index, int flags,
             String callingPackage, String attributionTag) {
         enforceModifyAudioRoutingPermission();
-        Objects.requireNonNull(attr, "attr must not be null");
-        int volumeGroup = AudioProductStrategy.getVolumeGroupIdForAudioAttributes(
-                attr, /* fallbackOnDefault= */false);
-        if (sVolumeGroupStates.indexOfKey(volumeGroup) < 0) {
-            Log.e(TAG, ": no volume group found for attributes " + attr.toString());
+        if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+            Log.e(TAG, ": no volume group found for id " + groupId);
             return;
         }
-        VolumeGroupState vgs = sVolumeGroupStates.get(volumeGroup);
+        VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
 
-        sVolumeLogger.log(new VolumeEvent(VolumeEvent.VOL_SET_GROUP_VOL, attr, vgs.name(),
+        sVolumeLogger.log(new VolumeEvent(VolumeEvent.VOL_SET_GROUP_VOL, vgs.name(),
                 index, flags, callingPackage + ", user " + getCurrentUserId()));
 
         vgs.setVolumeIndex(index, flags);
@@ -3690,7 +3687,7 @@ public class AudioService extends IAudioService.Stub
             try {
                 ensureValidStreamType(groupedStream);
             } catch (IllegalArgumentException e) {
-                Log.d(TAG, "volume group " + volumeGroup + " has internal streams (" + groupedStream
+                Log.d(TAG, "volume group " + groupId + " has internal streams (" + groupedStream
                         + "), do not change associated stream volume");
                 continue;
             }
@@ -3712,33 +3709,40 @@ public class AudioService extends IAudioService.Stub
         return null;
     }
 
-    /** @see AudioManager#getVolumeIndexForAttributes(attr) */
-    public int getVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
+    /** @see AudioManager#getVolumeGroupVolumeIndex(int) */
+    public int getVolumeGroupVolumeIndex(int groupId) {
         enforceModifyAudioRoutingPermission();
-        Objects.requireNonNull(attr, "attr must not be null");
         synchronized (VolumeStreamState.class) {
-            int volumeGroup = AudioProductStrategy.getVolumeGroupIdForAudioAttributes(
-                    attr, /* fallbackOnDefault= */false);
-            if (sVolumeGroupStates.indexOfKey(volumeGroup) < 0) {
-                throw new IllegalArgumentException("No volume group for attributes " + attr);
+            if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+                throw new IllegalArgumentException("No volume group for id " + groupId);
             }
-            VolumeGroupState vgs = sVolumeGroupStates.get(volumeGroup);
+            VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
             return vgs.isMuted() ? vgs.getMinIndex() : vgs.getVolumeIndex();
         }
     }
 
-    /** @see AudioManager#getMaxVolumeIndexForAttributes(attr) */
-    public int getMaxVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
+    /** @see AudioManager#getVolumeGroupMaxVolumeIndex(int) */
+    public int getVolumeGroupMaxVolumeIndex(int groupId) {
         enforceModifyAudioRoutingPermission();
-        Objects.requireNonNull(attr, "attr must not be null");
-        return AudioSystem.getMaxVolumeIndexForAttributes(attr);
+        synchronized (VolumeStreamState.class) {
+            if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+                throw new IllegalArgumentException("No volume group for id " + groupId);
+            }
+            VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
+            return vgs.getMaxIndex();
+        }
     }
 
-    /** @see AudioManager#getMinVolumeIndexForAttributes(attr) */
-    public int getMinVolumeIndexForAttributes(@NonNull AudioAttributes attr) {
+    /** @see AudioManager#getVolumeGroupMinVolumeIndex(int) */
+    public int getVolumeGroupMinVolumeIndex(int groupId) {
         enforceModifyAudioRoutingPermission();
-        Objects.requireNonNull(attr, "attr must not be null");
-        return AudioSystem.getMinVolumeIndexForAttributes(attr);
+        synchronized (VolumeStreamState.class) {
+            if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+                throw new IllegalArgumentException("No volume group for id " + groupId);
+            }
+            VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
+            return vgs.getMinIndex();
+        }
     }
 
     /** @see AudioDeviceVolumeManager#setDeviceVolume(VolumeInfo, AudioDeviceAttributes)
@@ -3815,6 +3819,45 @@ public class AudioService extends IAudioService.Stub
                 callingPackage, /*attributionTag*/ null);
     }
 
+    /** @see AudioManager#adjustVolumeGroupVolume(int, int, int) */
+    public void adjustVolumeGroupVolume(int groupId, int direction, int flags,
+                                        String callingPackage) {
+        ensureValidDirection(direction);
+        if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+            Log.e(TAG, ": no volume group found for id " + groupId);
+            return;
+        }
+        VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
+        sVolumeLogger.log(new VolumeEvent(VolumeEvent.VOL_ADJUST_GROUP_VOL, vgs.name(),
+                direction, flags, callingPackage));
+        vgs.adjustVolume(direction, flags);
+    }
+
+    /** @see AudioManager#getLastAudibleVolumeGroupVolume(int) */
+    public int getLastAudibleVolumeGroupVolume(int groupId) {
+        enforceQueryStatePermission();
+        synchronized (VolumeStreamState.class) {
+            if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+                Log.e(TAG, ": no volume group found for id " + groupId);
+                return 0;
+            }
+            VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
+            return vgs.getVolumeIndex();
+        }
+    }
+
+    /** @see AudioManager#isVolumeGroupMuted(int) */
+    public boolean isVolumeGroupMuted(int groupId) {
+        synchronized (VolumeStreamState.class) {
+            if (sVolumeGroupStates.indexOfKey(groupId) < 0) {
+                Log.e(TAG, ": no volume group found for id " + groupId);
+                return false;
+            }
+            VolumeGroupState vgs = sVolumeGroupStates.get(groupId);
+            return vgs.isMuted();
+        }
+    }
+
     /** @see AudioManager#setStreamVolume(int, int, int)
      * Part of service interface, check permissions here */
     public void setStreamVolumeWithAttribution(int streamType, int index, int flags,
@@ -7448,6 +7491,48 @@ public class AudioService extends IAudioService.Stub
             return mIsMuted;
         }
 
+        public void adjustVolume(int direction, int flags) {
+            synchronized (VolumeStreamState.class) {
+                int device = getDeviceForVolume();
+                int previousIndex = getIndex(device);
+
+                switch (direction) {
+                    case AudioManager.ADJUST_TOGGLE_MUTE: {
+                        // Note: If muted by volume 0, unmute will restore volume 0.
+                        mute(!mIsMuted);
+                        break;
+                    }
+                    case AudioManager.ADJUST_UNMUTE:
+                        // Note: If muted by volume 0, unmute will restore volume 0.
+                        mute(false);
+                        break;
+                    case AudioManager.ADJUST_MUTE:
+                        // May be already muted by setvolume 0, prevent from setting same value
+                        if (previousIndex != 0) {
+                            // bypass persist
+                            mute(true);
+                        }
+                        mIsMuted = true;
+                        break;
+                    case AudioManager.ADJUST_RAISE:
+                        // As for stream, RAISE during mute will increment the index
+                        setVolumeIndex(Math.min(previousIndex + 1, mIndexMax),  device, flags);
+                        break;
+                    case AudioManager.ADJUST_LOWER:
+                        // For stream, ADJUST_LOWER on a muted VSS is a no-op
+                        // If we decide to unmute on ADJUST_LOWER, cannot fallback on
+                        // adjustStreamVolume for group associated to legacy stream type
+                        if (isMuted() && previousIndex != 0) {
+                            mute(false);
+                        } else {
+                            int newIndex = Math.max(previousIndex - 1, mIndexMin);
+                            setVolumeIndex(newIndex, device, flags);
+                        }
+                        break;
+                }
+            }
+        }
+
         public int getVolumeIndex() {
             synchronized (VolumeStreamState.class) {
                 return getIndex(getDeviceForVolume());
diff --git a/services/core/java/com/android/server/audio/AudioServiceEvents.java b/services/core/java/com/android/server/audio/AudioServiceEvents.java
index c2c3f028abdb0..6cbe03ed87d3e 100644
--- a/services/core/java/com/android/server/audio/AudioServiceEvents.java
+++ b/services/core/java/com/android/server/audio/AudioServiceEvents.java
@@ -17,7 +17,6 @@
 package com.android.server.audio;
 
 import android.annotation.NonNull;
-import android.media.AudioAttributes;
 import android.media.AudioDeviceAttributes;
 import android.media.AudioManager;
 import android.media.AudioSystem;
@@ -221,6 +220,7 @@ public class AudioServiceEvents {
         static final int VOL_SET_GROUP_VOL = 8;
         static final int VOL_MUTE_STREAM_INT = 9;
         static final int VOL_SET_LE_AUDIO_VOL = 10;
+        static final int VOL_ADJUST_GROUP_VOL = 11;
 
         final int mOp;
         final int mStream;
@@ -228,7 +228,6 @@ public class AudioServiceEvents {
         final int mVal2;
         final String mCaller;
         final String mGroupName;
-        final AudioAttributes mAudioAttributes;
 
         /** used for VOL_ADJUST_VOL_UID,
          *           VOL_ADJUST_SUGG_VOL,
@@ -241,7 +240,6 @@ public class AudioServiceEvents {
             mVal2 = val2;
             mCaller = caller;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
@@ -254,7 +252,6 @@ public class AudioServiceEvents {
             mStream = -1;
             mCaller = null;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
@@ -267,7 +264,6 @@ public class AudioServiceEvents {
             mStream = -1;
             mCaller = null;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
@@ -280,7 +276,6 @@ public class AudioServiceEvents {
             // unused
             mCaller = null;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
@@ -293,19 +288,18 @@ public class AudioServiceEvents {
             // unused
             mCaller = null;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
-        /** used for VOL_SET_GROUP_VOL */
-        VolumeEvent(int op, AudioAttributes aa, String group, int index, int flags, String caller) {
+        /** used for VOL_SET_GROUP_VOL,
+         *           VOL_ADJUST_GROUP_VOL */
+        VolumeEvent(int op, String group, int index, int flags, String caller) {
             mOp = op;
             mStream = -1;
             mVal1 = index;
             mVal2 = flags;
             mCaller = caller;
             mGroupName = group;
-            mAudioAttributes = aa;
             logMetricEvent();
         }
 
@@ -317,7 +311,6 @@ public class AudioServiceEvents {
             mVal2 = 0;
             mCaller = null;
             mGroupName = null;
-            mAudioAttributes = null;
             logMetricEvent();
         }
 
@@ -359,6 +352,15 @@ public class AudioServiceEvents {
                             .record();
                     return;
                 }
+                case VOL_ADJUST_GROUP_VOL:
+                    new MediaMetrics.Item(mMetricsId)
+                            .set(MediaMetrics.Property.CALLING_PACKAGE, mCaller)
+                            .set(MediaMetrics.Property.DIRECTION, mVal1 > 0 ? "up" : "down")
+                            .set(MediaMetrics.Property.EVENT, "adjustVolumeGroupVolume")
+                            .set(MediaMetrics.Property.FLAGS, mVal2)
+                            .set(MediaMetrics.Property.GROUP, mGroupName)
+                            .record();
+                    return;
                 case VOL_SET_STREAM_VOL:
                     new MediaMetrics.Item(mMetricsId)
                             .set(MediaMetrics.Property.CALLING_PACKAGE, mCaller)
@@ -410,7 +412,6 @@ public class AudioServiceEvents {
                     return;
                 case VOL_SET_GROUP_VOL:
                     new MediaMetrics.Item(mMetricsId)
-                            .set(MediaMetrics.Property.ATTRIBUTES, mAudioAttributes.toString())
                             .set(MediaMetrics.Property.CALLING_PACKAGE, mCaller)
                             .set(MediaMetrics.Property.EVENT, "setVolumeIndexForAttributes")
                             .set(MediaMetrics.Property.FLAGS, mVal2)
@@ -436,6 +437,13 @@ public class AudioServiceEvents {
                             .append(" flags:0x").append(Integer.toHexString(mVal2))
                             .append(") from ").append(mCaller)
                             .toString();
+                case VOL_ADJUST_GROUP_VOL:
+                    return new StringBuilder("adjustVolumeGroupVolume(group:")
+                            .append(mGroupName)
+                            .append(" dir:").append(AudioManager.adjustToString(mVal1))
+                            .append(" flags:0x").append(Integer.toHexString(mVal2))
+                            .append(") from ").append(mCaller)
+                            .toString();
                 case VOL_ADJUST_STREAM_VOL:
                     return new StringBuilder("adjustStreamVolume(stream:")
                             .append(AudioSystem.streamToString(mStream))
@@ -484,8 +492,7 @@ public class AudioServiceEvents {
                             .append(" stream:").append(AudioSystem.streamToString(mStream))
                             .toString();
                 case VOL_SET_GROUP_VOL:
-                    return new StringBuilder("setVolumeIndexForAttributes(attr:")
-                            .append(mAudioAttributes.toString())
+                    return new StringBuilder("setVolumeIndexForAttributes(group:")
                             .append(" group: ").append(mGroupName)
                             .append(" index:").append(mVal1)
                             .append(" flags:0x").append(Integer.toHexString(mVal2))