Mm - hmm. Can I ask a , I mean  a sort of top - level question , which is  um " if  if most of what the OGI folk are working with is trying to  integrate this other  other uh spectral subtraction ,  why are we worrying about it ? "
Mm - hmm. About ? Spectral subtraction ?
Yeah.
It 's just uh  Well it 's another  They are trying to u to use the um   the Ericsson and we 're trying to use something  something else. And. Yeah , and also to understand what happens because