title: EFI Shell: How to beep?
body: <p>in the EFi-Shell I want to make beep via the board speaker.
  Can´t find any command or hint how to do so in the internet.</p>
  
  <p>I´ve already tried as supposed in other discussions (not referring EFI-Shell):</p>
  
  <p>echo '\a'</p>
  
  <p>echo '\007'</p>
  
  <p>I´m running the system on an Intel Atom Processor.</p>