diff --git a/lib/mp4_generic.cpp b/lib/mp4_generic.cpp
index 61373ac1..9a3d31d1 100644
--- a/lib/mp4_generic.cpp
+++ b/lib/mp4_generic.cpp
@@ -2590,6 +2590,14 @@ namespace MP4{
     setSampleSize(16);
     setSampleRate(44100);
   }
+  
+  uint16_t AudioSampleEntry::toAACInit(){
+    uint16_t result = 0;
+    result |= (2 & 0x1F) << 11;
+    result |= (getSampleRate() & 0x0F) << 7;
+    result |= (getChannelCount() & 0x0F) << 3;
+    return result;
+  }
 
   void AudioSampleEntry::setCodec(const char* newCodec){
     memcpy(data + 4, newCodec, 4);
diff --git a/lib/mp4_generic.h b/lib/mp4_generic.h
index f66667bc..e6d39054 100644
--- a/lib/mp4_generic.h
+++ b/lib/mp4_generic.h
@@ -592,6 +592,7 @@ namespace MP4{
       void setPreDefined(uint16_t newPreDefined);
       uint16_t getPreDefined();
       void setSampleRate(uint32_t newSampleRate);
+      uint16_t toAACInit();
       uint32_t getSampleRate();
       void setCodecBox(Box& newBox);
       Box & getCodecBox();