title: How to set a flag in image bits to mark the end of an audio file
body: <p>Currently, I'm trying to hide audio files of wave formats inside images of bitmap format.</p>
  
  <p>I transformed both of them into binary form and now I'm trying to set some kind of flag to mark the end of the audio file so that when I'm extracting the audio from the image I know where to stop.</p>
  
  <p>Notes to consider
  1: the image is 24bit.</p>
  
  <p>2: the audio data is PCM 16 bit.</p>
  
  <p>3: I'm using LSB so each 16 bit of audio needs at least 5 pixels and an element of the sixth pixel (5*3 = 15 + 1 =16).</p>