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<blockquote data-quote="Peter Morris" data-source="post: 147713" data-attributes="member: 652"><p>Re: FIR filters</p><p></p><p></p><p></p><p>Michael … great work …fantastic stuff, can’t wait to see what you have come up with <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />~<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />~:smile: …</p><p></p><p>This topic is all about how FIR filters work, not my DIY project, but this is exactly what I have done with the Lake processing – I used both FIR and IIR filters, but also separately flattened the phase response as much as I was prepared to tolerate in terms of increasing the system latency so that I had a flat phase response across the critical vocal region. Refer the red phase correction trace.</p><p></p><p>Quit a few people are starting to do this; Dave Gunness does this with Fulcrum speakers and previously for EAW’s with their (Gunness) focusing.</p><p></p><p>Four audio are also doing this with their processor and Monkey Forrest software. <a href="http://www.fouraudio.com/en/home.html" target="_blank">http://www.fouraudio.com/en/home.html</a></p><p> <a href="http://www.four-audio.com/data/AES32/AES32FourAudio.pdf" target="_blank">http://www.four-audio.com/data/AES32/AES32FourAudio.pdf</a></p><p></p><p>It’s also possible with this FIR engine <a href="http://aplaudio.com/conc2/products/apl1s/" target="_blank">http://aplaudio.com/conc2/products/apl1s/</a> and the associated software, but I don’t think the phase correction is enabled at this stage.</p><p></p><p>Jack, I have done exactly what you asked with the passive crossover for your BMS4594 using a Lake LM26.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 147713, member: 652"] Re: FIR filters Michael … great work …fantastic stuff, can’t wait to see what you have come up with :)~:-)~:smile: … This topic is all about how FIR filters work, not my DIY project, but this is exactly what I have done with the Lake processing – I used both FIR and IIR filters, but also separately flattened the phase response as much as I was prepared to tolerate in terms of increasing the system latency so that I had a flat phase response across the critical vocal region. Refer the red phase correction trace. Quit a few people are starting to do this; Dave Gunness does this with Fulcrum speakers and previously for EAW’s with their (Gunness) focusing. Four audio are also doing this with their processor and Monkey Forrest software. [URL]http://www.fouraudio.com/en/home.html[/URL] [URL]http://www.four-audio.com/data/AES32/AES32FourAudio.pdf[/URL] It’s also possible with this FIR engine [URL]http://aplaudio.com/conc2/products/apl1s/[/URL] and the associated software, but I don’t think the phase correction is enabled at this stage. Jack, I have done exactly what you asked with the passive crossover for your BMS4594 using a Lake LM26. [/QUOTE]
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