It 's  it 's , you know , no big deal. It 's  you know , you could have ten , twenty , maybe thirty millivolts , whatever , and it 's consistently in there. The thing is , most people 's front - ends have pre - emphasis with it , with zero at zero frequency , so that it 's irrelevant. Uh , but with P L P , we didn't actually have that. We had  we had the equivalent of pre - emphasis in a  a , uh , Fletcher - Munson style weighting that occurs in the middle of P L but it doesn't actually have a zero at zero frequency ,
Hmm.
like , eh , uh , typical simple fr pre - emphasis does. We had something more fancy. It was later on it didn't have that. So at that point I reali " oh sh we better have a  have a high - pass filter " just , you know   just take care of the problem. So I put in a high - pass filter at , uh , I think ninety  ninety hertz or so  uh , for a sixteen kilohertz sampling rate. And I never put anything in to adjust it for different  different sampling rates. And so  well , so , you know , the code doesn't know anything about that and so this is all at eight kilohertz and so it was at forty - five hertz instead of at   instead of at ninety.
Hmm.