title: Bandpass filter, which frequency and Q value to represent frequency range?
body: <p>I want to use a Web Audio bandpass filter to emphasise the frequencies from 300Hz to 3kHz.</p>
  
  <p>However the <a href="https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode" rel="nofollow noreferrer">bandpass filter in the Web Audio API</a> has only one frequency value (representing the center) and one <a href="https://stackoverflow.com/questions/15627013/how-do-i-configure-a-bandpass-filter">Q</a> value (representing octaves?).</p>
  
  <p>How to set them correctly to represent my <code>to</code> and <code>from</code> frequeuncy range?</p>