title: How can I calculate the audio time by byte position (bytes to secounds)?
body: <p>I have the audio file and byte range. I want get time for each byte position. I'm use php.</p>
  
  <p>I tried to calculate that using this formula: <code>$time = $byte/($bitRate * $sampleRate * $cannels)</code>
  But it doesn't work.</p>
  
  <p>So how can I calculate this? I used ffmpeg (php-ffmpeg), and if you know how to find this data with ffmpeg, that would be fine;</p>