diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index 325f780..26a25b0 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -135,7 +135,7 @@
      * sampleRate:         Track sampling rate in Hz.
      * format:             Audio format (e.g AUDIO_FORMAT_PCM_16_BIT for signed
      *                     16 bits per sample).
-     * channelMask:        Channel mask: see audio_channels_t.
+     * channelMask:        Channel mask.
      * frameCount:         Minimum size of track PCM buffer in frames. This defines the
      *                     latency of the track. The actual size selected by the AudioTrack could be
      *                     larger if the requested size is not compatible with current audio HAL
@@ -154,7 +154,7 @@
                         AudioTrack( audio_stream_type_t streamType,
                                     uint32_t sampleRate  = 0,
                                     audio_format_t format = AUDIO_FORMAT_DEFAULT,
-                                    int channelMask      = 0,
+                                    audio_channel_mask_t channelMask = 0,
                                     int frameCount       = 0,
                                     audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
                                     callback_t cbf       = NULL,
@@ -186,7 +186,7 @@
                         AudioTrack( audio_stream_type_t streamType,
                                     uint32_t sampleRate = 0,
                                     audio_format_t format = AUDIO_FORMAT_DEFAULT,
-                                    int channelMask     = 0,
+                                    audio_channel_mask_t channelMask = 0,
                                     const sp<IMemory>& sharedBuffer = 0,
                                     audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
                                     callback_t cbf      = NULL,
@@ -204,13 +204,13 @@
      * Returned status (from utils/Errors.h) can be:
      *  - NO_ERROR: successful initialization
      *  - INVALID_OPERATION: AudioTrack is already initialized
-     *  - BAD_VALUE: invalid parameter (channels, format, sampleRate...)
+     *  - BAD_VALUE: invalid parameter (channelMask, format, sampleRate...)
      *  - NO_INIT: audio server or audio hardware not initialized
      * */
             status_t    set(audio_stream_type_t streamType = AUDIO_STREAM_DEFAULT,
                             uint32_t sampleRate = 0,
                             audio_format_t format = AUDIO_FORMAT_DEFAULT,
-                            int channelMask     = 0,
+                            audio_channel_mask_t channelMask = 0,
                             int frameCount      = 0,
                             audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
                             callback_t cbf      = NULL,
@@ -485,7 +485,7 @@
             status_t createTrack_l(audio_stream_type_t streamType,
                                  uint32_t sampleRate,
                                  audio_format_t format,
-                                 uint32_t channelMask,
+                                 audio_channel_mask_t channelMask,
                                  int frameCount,
                                  audio_output_flags_t flags,
                                  const sp<IMemory>& sharedBuffer,
@@ -510,7 +510,7 @@
     uint8_t                 mChannelCount;
     uint8_t                 mMuted;
     uint8_t                 mReserved;
-    uint32_t                mChannelMask;
+    audio_channel_mask_t    mChannelMask;
     status_t                mStatus;
     uint32_t                mLatency;
 
diff --git a/libvideoeditor/lvpp/VideoEditorAudioPlayer.cpp b/libvideoeditor/lvpp/VideoEditorAudioPlayer.cpp
index 797686c..c111ba8 100755
--- a/libvideoeditor/lvpp/VideoEditorAudioPlayer.cpp
+++ b/libvideoeditor/lvpp/VideoEditorAudioPlayer.cpp
@@ -534,9 +534,7 @@
     } else {
         mAudioTrack = new AudioTrack(
                 AUDIO_STREAM_MUSIC, mSampleRate, AUDIO_FORMAT_PCM_16_BIT,
-                (numChannels == 2)
-                    ? AUDIO_CHANNEL_OUT_STEREO
-                    : AUDIO_CHANNEL_OUT_MONO,
+                audio_channel_out_mask_from_count(numChannels),
                 0, AUDIO_OUTPUT_FLAG_NONE, &AudioCallback, this, 0);
 
         if ((err = mAudioTrack->initCheck()) != OK) {
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 177359b..73d396e 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -103,7 +103,7 @@
         audio_stream_type_t streamType,
         uint32_t sampleRate,
         audio_format_t format,
-        int channelMask,
+        audio_channel_mask_t channelMask,
         int frameCount,
         audio_output_flags_t flags,
         callback_t cbf,
@@ -136,7 +136,8 @@
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(SP_DEFAULT)
 {
-    mStatus = set((audio_stream_type_t)streamType, sampleRate, (audio_format_t)format, channelMask,
+    mStatus = set((audio_stream_type_t)streamType, sampleRate, (audio_format_t)format,
+            (audio_channel_mask_t) channelMask,
             frameCount, (audio_output_flags_t)flags, cbf, user, notificationFrames,
             0 /*sharedBuffer*/, false /*threadCanCallJava*/, sessionId);
 }
@@ -145,7 +146,7 @@
         audio_stream_type_t streamType,
         uint32_t sampleRate,
         audio_format_t format,
-        int channelMask,
+        audio_channel_mask_t channelMask,
         const sp<IMemory>& sharedBuffer,
         audio_output_flags_t flags,
         callback_t cbf,
@@ -186,7 +187,7 @@
         audio_stream_type_t streamType,
         uint32_t sampleRate,
         audio_format_t format,
-        int channelMask,
+        audio_channel_mask_t channelMask,
         int frameCount,
         audio_output_flags_t flags,
         callback_t cbf,
@@ -252,7 +253,7 @@
     }
 
     if (!audio_is_output_channel(channelMask)) {
-        ALOGE("Invalid channel mask");
+        ALOGE("Invalid channel mask %#x", channelMask);
         return BAD_VALUE;
     }
     uint32_t channelCount = popcount(channelMask);
@@ -286,7 +287,7 @@
     status_t status = createTrack_l(streamType,
                                   sampleRate,
                                   format,
-                                  (uint32_t)channelMask,
+                                  channelMask,
                                   frameCount,
                                   flags,
                                   sharedBuffer,
@@ -304,7 +305,7 @@
 
     mStreamType = streamType;
     mFormat = format;
-    mChannelMask = (uint32_t)channelMask;
+    mChannelMask = channelMask;
     mChannelCount = channelCount;
     mSharedBuffer = sharedBuffer;
     mMuted = false;
@@ -749,7 +750,7 @@
         audio_stream_type_t streamType,
         uint32_t sampleRate,
         audio_format_t format,
-        uint32_t channelMask,
+        audio_channel_mask_t channelMask,
         int frameCount,
         audio_output_flags_t flags,
         const sp<IMemory>& sharedBuffer,
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index f5d6fd6..71e7c31 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -135,7 +135,7 @@
                                 audio_io_handle_t input,
                                 uint32_t sampleRate,
                                 audio_format_t format,
-                                uint32_t channelMask,
+                                audio_channel_mask_t channelMask,
                                 int frameCount,
                                 track_flags_t flags,
                                 pid_t tid,