But
So , they 're  they 're looking at a mixed signal , or they 're looking  what  what are they looking at visually ?
Well , they have a choice. They could choose any signal to look at. I 've tried lookin but usually they look at the mixed. But I 've  I 've tried looking at the single signal and  and in order to judge when it  when it was speech and when it wasn't ,
Oh.