diff --git a/include/media/IAudioTrack.h b/include/media/IAudioTrack.h
index e4772a1..77f3e21 100644
--- a/include/media/IAudioTrack.h
+++ b/include/media/IAudioTrack.h
@@ -24,7 +24,7 @@
 #include <utils/Errors.h>
 #include <binder/IInterface.h>
 #include <binder/IMemory.h>
-
+#include <utils/LinearTransform.h>
 
 namespace android {
 
@@ -71,6 +71,23 @@
      */
     virtual status_t    attachAuxEffect(int effectId) = 0;
 
+
+    /* Allocate a shared memory buffer suitable for holding timed audio
+       samples */
+    virtual status_t    allocateTimedBuffer(size_t size,
+                                            sp<IMemory>* buffer) = 0;
+
+    /* Queue a buffer obtained via allocateTimedBuffer for playback at the given
+       timestamp */
+    virtual status_t    queueTimedBuffer(const sp<IMemory>& buffer,
+                                         int64_t pts) = 0;
+
+    /* Define the linear transform that will be applied to the timestamps
+       given to queueTimedBuffer (which are expressed in media time).
+       Target specifies whether this transform converts media time to local time
+       or Tungsten time. The values for target are defined in AudioTrack.h */
+    virtual status_t    setMediaTimeTransform(const LinearTransform& xform,
+                                              int target) = 0;
 };
 
 // ----------------------------------------------------------------------------