title: how to convert level meter to Hz in iPhone?
body: <p>I'm using AudioQueue to get recording level meter via microphone. The problem is what I got from it are floating point numbers. I know they represents for audio sample.</p>
  
  <p>I need to convert it to Hz. My assignment is to convert a digital signal audio recording from microphone. Convert it to Hz and do a simple formula to get a result that relevant to this number.</p>
  
  <p>Please help, I really appreciate your help.</p>
  
  <p>Thanks,</p>
  
  <p>Quan </p>