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Low Earth Orbit
DIY Audio
(MOVED) - FIR discussion spinoff
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<blockquote data-quote="Bennett Prescott" data-source="post: 26597" data-attributes="member: 4"><p>Re: DSP latency</p><p></p><p>Kimo,</p><p></p><p>The FIR is on top of the base latency of the processor, which is due to consequences of the AD and DA and other such largely unavoidable issues. I am well aware of the effects of latency on loudspeaker systems, and feel in general it should be minimized in any live reinforcement situation. As Ales Dravinec once memorably said, I want the audio to happen now, not later. Using longer FIRs to attempt to solve LF problems that can be easily mitigated with IIR processing is just sloppy engineering, IMHO.</p><p></p><p>I don't want to put words into Dave Gunness's mouth, but I believe he told me he uses a fixed 4ms time window on his FIRs, and only introduces 1.5ms of latency. A shorter FIR is possible depending on how tolerant you are of artifacts and how low a frequency you want to go to.</p></blockquote><p></p>
[QUOTE="Bennett Prescott, post: 26597, member: 4"] Re: DSP latency Kimo, The FIR is on top of the base latency of the processor, which is due to consequences of the AD and DA and other such largely unavoidable issues. I am well aware of the effects of latency on loudspeaker systems, and feel in general it should be minimized in any live reinforcement situation. As Ales Dravinec once memorably said, I want the audio to happen now, not later. Using longer FIRs to attempt to solve LF problems that can be easily mitigated with IIR processing is just sloppy engineering, IMHO. I don't want to put words into Dave Gunness's mouth, but I believe he told me he uses a fixed 4ms time window on his FIRs, and only introduces 1.5ms of latency. A shorter FIR is possible depending on how tolerant you are of artifacts and how low a frequency you want to go to. [/QUOTE]
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