But you 're looking a y you 're looking at  Let 's take a second with this. Uh , uh , you 're looking at f at the phase derivative , um , in  in , uh , what domain ? I mean this is  this is in  in  in  in bands ? Or  or
No , no , no.
Just  just overall
It 's a  it 's a  o i w the band  the band is , eh , from zero to  to four kilohertz. And I  I ot I