diff --git a/audio/5.0/IStreamIn.hal b/audio/5.0/IStreamIn.hal
index b042960..e15b034 100644
--- a/audio/5.0/IStreamIn.hal
+++ b/audio/5.0/IStreamIn.hal
@@ -169,6 +169,10 @@
     /**
      * Specifies the logical microphone (for processing).
      *
+     * If the feature is not supported an error should be returned
+     * If multiple microphones are present, this should be treated as a preference
+     * for their combined direction.
+     *
      * Optional method
      *
      * @param Direction constant
@@ -180,6 +184,10 @@
     /**
      * Specifies the zoom factor for the selected microphone (for processing).
      *
+     * If the feature is not supported an error should be returned
+     * If multiple microphones are present, this should be treated as a preference
+     * for their combined field dimension.
+     *
      * Optional method
      *
      * @param the desired field dimension of microphone capture. Range is from -1 (wide angle),
diff --git a/current.txt b/current.txt
index 3801d0b..e0923d6 100644
--- a/current.txt
+++ b/current.txt
@@ -416,7 +416,7 @@
 0a911297821854985cfcdb17b63d7948af0f0f51ce8c68cc86367c185bbc772e android.hardware.audio@5.0::IDevicesFactory
 ce2e8c6c8559fd42bd69e0dee27b4d9c93cd9b2eff487b4e6b6395b6a1a993d6 android.hardware.audio@5.0::IPrimaryDevice
 4a4e5e5d9357004a1256bde8d36010ee00c51cea811a1c1e0dd969a9fc0bf862 android.hardware.audio@5.0::IStream
-e05e48c583de14c1e5a6fa9d48ea50244e3e0924b76b342374e7471dc8007ba9 android.hardware.audio@5.0::IStreamIn
+b9d41ff4031266de1ecef394a8a64de7d857634dd08dc6be855fca2fe3075975 android.hardware.audio@5.0::IStreamIn
 9471b12b1c255bb530695720bc4174bd74987b75b1f820854af8944bc8c215c9 android.hardware.audio@5.0::IStreamOut
 1b0500367ed2b32a841667ac3200edf3d3a164e8004aca445ff1b085ac831e93 android.hardware.audio@5.0::IStreamOutCallback
 83e365479cc77d8717c155e1787ee668cd2ae4c557b467cf75b8e7cd53697ad8 android.hardware.audio@5.0::types