diff --git a/media/java/android/media/AudioFormat.java b/media/java/android/media/AudioFormat.java
index 04c6e97..ad0d459 100644
--- a/media/java/android/media/AudioFormat.java
+++ b/media/java/android/media/AudioFormat.java
@@ -88,12 +88,22 @@
 
     public static final int CHANNEL_OUT_MONO = CHANNEL_OUT_FRONT_LEFT;
     public static final int CHANNEL_OUT_STEREO = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT);
+    // aka QUAD_BACK
     public static final int CHANNEL_OUT_QUAD = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
             CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT);
+    /** @hide */
+    public static final int CHANNEL_OUT_QUAD_SIDE = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
+            CHANNEL_OUT_SIDE_LEFT | CHANNEL_OUT_SIDE_RIGHT);
     public static final int CHANNEL_OUT_SURROUND = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
             CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_BACK_CENTER);
+    // aka 5POINT1_BACK
     public static final int CHANNEL_OUT_5POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
             CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT);
+    /** @hide */
+    public static final int CHANNEL_OUT_5POINT1_SIDE = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
+            CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY |
+            CHANNEL_OUT_SIDE_LEFT | CHANNEL_OUT_SIDE_RIGHT);
+    // TODO does this need an @deprecated ?
     // different from AUDIO_CHANNEL_OUT_7POINT1
     public static final int CHANNEL_OUT_7POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
             CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT |