Uh so it 's  it  you have a  a direct uh  Uh , what 's the difference in  If you were trying to construct a linear filter , that would um
I 'm signing off.
Yeah. that would subtract off  the um uh parts of the signal that were the aspects of the signal that were different between the close - talk and the distant. You know , so  so uh um I guess in most echo cancellation  Yeah , so you  Given that um  Yeah , so you 're trying to  So you 'd  There 's a  a distance between the close and the distant mikes so there 's a time delay there , and after the time delay , there 's these various reflections. And if you figure out well what 's the  there 's a  a least squares algorithm that adjusts itself  adjusts the weight so that you try to subtract  essentially to subtract off uh different uh  different reflections. Right ? So let 's take the simple case where you just had  you had some uh some delay in a satellite connection or something and then there 's a  there 's an echo. It comes back. And you want to adjust this filter so that it will maximally reduce the effect of this echo.
So that would mean like if you were listening to the data that was recorded on one of those. Uh , just the raw data , you would  you might hear kind of an echo ? And  and then this  noise cancellation would get