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DSP Filters and slopes?
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<blockquote data-quote="Curtis H List (Too Tall)" data-source="post: 27373" data-attributes="member: 160"><p>Re: DSP Filters and slopes?</p><p></p><p>Hi Peter,</p><p>The FIR was its "Thing" from what I recall.</p><p>On the other hand it most likely used IIR for live applications and left the FIR function in the road case.</p><p></p><p>As I recall one of the fixes that it was used for was a very narrow ring at or above 10kHz in some studio tracks.</p><p>He used an extremely narrow and deep FIR filter without disturbing the SPL or phase or even worse have the fix introduce its own "ring" which IIR are known to create if you try to make the filter too steep.</p><p></p><p>Years after it was introduced I talked to a guy who used it for an overseas tour.</p><p>He said it was too noisy. My guess is he had little experience with Digital xovers. </p><p>Can't blame him for that. There were few around.</p><p>You have to be very careful you don't cut down its output inside the device and lose dynamic range as you head toward the noise floor.</p><p></p><p>Lots of DIY home audio types use the Behringer 2496. When they get to the the outputs they turn the gain in the DSP rather than turn down the the amp inputs and can not figure out why it is so noisy. Of course you have the added problem of going from Pro level to Home Audio level.</p></blockquote><p></p>
[QUOTE="Curtis H List (Too Tall), post: 27373, member: 160"] Re: DSP Filters and slopes? Hi Peter, The FIR was its "Thing" from what I recall. On the other hand it most likely used IIR for live applications and left the FIR function in the road case. As I recall one of the fixes that it was used for was a very narrow ring at or above 10kHz in some studio tracks. He used an extremely narrow and deep FIR filter without disturbing the SPL or phase or even worse have the fix introduce its own "ring" which IIR are known to create if you try to make the filter too steep. Years after it was introduced I talked to a guy who used it for an overseas tour. He said it was too noisy. My guess is he had little experience with Digital xovers. Can't blame him for that. There were few around. You have to be very careful you don't cut down its output inside the device and lose dynamic range as you head toward the noise floor. Lots of DIY home audio types use the Behringer 2496. When they get to the the outputs they turn the gain in the DSP rather than turn down the the amp inputs and can not figure out why it is so noisy. Of course you have the added problem of going from Pro level to Home Audio level. [/QUOTE]
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