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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Peter Morris" data-source="post: 211778" data-attributes="member: 652"><p>Hi Ti,</p><p></p><p>What I have been doing for the sub crossover is to use an IIR to keep the latency acceptable for FOH application. I think typically you can get away with 10 ms (or more) as the loud backline instruments are usually at least this distance in time behind the FOH speakers.</p><p></p><p>I then use the ‘phase trace overlay method' to match the two phase traces often adding and additional all-pass filter to the sub to get every thing to match perfectly.</p><p></p><p>When adding all-pass filters to various pass bands you have be mindful of the resulting signal polarity, sometimes you may end up flipping it to get every thing to line up correctly.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 211778, member: 652"] Hi Ti, What I have been doing for the sub crossover is to use an IIR to keep the latency acceptable for FOH application. I think typically you can get away with 10 ms (or more) as the loud backline instruments are usually at least this distance in time behind the FOH speakers. I then use the ‘phase trace overlay method' to match the two phase traces often adding and additional all-pass filter to the sub to get every thing to match perfectly. When adding all-pass filters to various pass bands you have be mindful of the resulting signal polarity, sometimes you may end up flipping it to get every thing to line up correctly. [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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