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In Reply to: "low dispersion" posted by DrChaos on July 16, 2020 at 09:52:53:
FIR filters are linear phase and have constant group delay, same at all frequencies. Filters 3,4, and 6 all have short impulse responses. Filter 3 has the steepest roll-off, but it's still not that steep (not brick-wall). Filter 4 has a slightly slower roll-off and will let a little more aliasing through. But Filter 6, the "low dispersion" one, has a really slow roll-off that doesn't hit the floor until nearly 40 KHz (this is for a 44.1k input). I'm just curious what the idea was behind that filter.
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- They're all FIR filters - Dave_K 07/17/2007:22:16 07/17/20 (0)
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