So , um , since we 're looking at putting this , um  mean log m magnitude spectral subtraction , um , into the SmartKom system , I I did a test seeing if , um , it would work using past only  and plus the present to calculate the mean. So , I did a test , um ,  where I used twelve seconds from the past and the present frame to , um , calculate the mean. And
Twelve seconds  Twelve  twelve seconds back from the current  frame , is that what you mean ?
Uh  Twelve seconds , um , counting back from the end of the current frame ,
OK , OK.