From: Mark Taylor <[EMAIL PROTECTED]>
>Just a note on the highpass filter: at 44.1khz sampling rate,
>we only have 576 MDCT coefficients on which the filter acts and thus
>a frequency resolution of only 22050/576 = 38Hz. So the accuracy of the first
>few coefficients is questionable, and a highpass filter at 50Hz would
>only effect the first 2 MDCT coefficients. I dont know how big a problem
>this is, but a true 50Hz filter would need to be done before
>calling lame, using a much larger fft/mdct window.
What is the purpose of this high-pass filtering ?
You said that it would affect only 2 MDCT coeficients, that is
less than a percent of them all, so what gain do you/we expect from it ?
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David Balazic , student
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