This Spirit Box scans reversed speech audio banks randomly sweeping at user preferences adjusting slider (or you can choose to use auto engine). To rule out false positives most banks are based on dead languages ​​not used today, to give "them" those human tones for manipulation, our theory is that they can use it to speak to you in your own language. The echo function is designed to use with external speaker, use the echo slider to adjust input from mic. to avoid feedback noise. Camera button a