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DSP Filters and slopes?
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<blockquote data-quote="Douglas R. Allen" data-source="post: 1494" data-attributes="member: 71"><p>At the risk of sounding silly (again) I have a question about DSPs and filter alignments.</p><p>For the most part filters in DSPs copy analog filters. BW,LR,Bis, etc.</p><p>Why?</p><p>With the processing power available today wouldn't it be better to write the unwanted freq. out of the code?</p><p></p><p>In the dsp world why not stop freq above and below a set point with code?</p><p>At the crossover point as an example of 90hz sub to low-mid.</p><p>At the 90 hz subwoofer output when the dsp sees freq. above this it just doesn't pass them.</p><p>It gives no 0s or 1s for any freq above 90hz. </p><p>Same with 90hz and above in the low mid out. It will make 0s and 1s for 90hz and above but none for 89.99999999hz and below.</p><p>Simply write unwanted freq. out of the code. There must be 0s and 1s for every freq. now or is this not how it works?</p><p>Or is this something that can't be done?</p><p>As its easy to tell I am unsure how the analog to digital back to analog works. </p><p>Anyone?</p><p>Just pondering.</p><p>Thanks;</p><p>Douglas R. Allen</p></blockquote><p></p>
[QUOTE="Douglas R. Allen, post: 1494, member: 71"] At the risk of sounding silly (again) I have a question about DSPs and filter alignments. For the most part filters in DSPs copy analog filters. BW,LR,Bis, etc. Why? With the processing power available today wouldn't it be better to write the unwanted freq. out of the code? In the dsp world why not stop freq above and below a set point with code? At the crossover point as an example of 90hz sub to low-mid. At the 90 hz subwoofer output when the dsp sees freq. above this it just doesn't pass them. It gives no 0s or 1s for any freq above 90hz. Same with 90hz and above in the low mid out. It will make 0s and 1s for 90hz and above but none for 89.99999999hz and below. Simply write unwanted freq. out of the code. There must be 0s and 1s for every freq. now or is this not how it works? Or is this something that can't be done? As its easy to tell I am unsure how the analog to digital back to analog works. Anyone? Just pondering. Thanks; Douglas R. Allen [/QUOTE]
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