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Old 19-07-2006, 04:26 AM   #17
boggy
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Default Re: Hi Pass - poredjenje EQ-a

Quote:
Originally Posted by idekius
.....kod njega Hi Pass u 12 i 24 db rezimu radi "blaze", dok u onom najbrutalnijem Butterworth 6 rezimu sece kao ziletom!

....
"Butterworth 6"... naslucujem da je to verovatno filter sestog reda (prethodni su bili drugog i cetvrtog reda), i njegov slope je 36dB/oct, ali to i dalje nije brickwall tip filtra ciji slope moze ici i do 100-200dB/oct... te ako vam "Butterworth 6" to radi dobro, zaboravite na brickwall...

pozdrav

bogi


p.s. eee... da, cuvajte se faznih "izoblicenja" koje unosi filter viseg reda onom delu signala koji je propustio blizu frekvencije na koju je podesen, jer je to normalna pojava i sto je filter "visochijeg" reda te pojave su drasticnije... za svaki slucaj da napomenem...
Ne verujem da se to moze cuti u osnovnom filtriranom signalu, ali moze dati neocekivane i "neobjasnjive" rezultate kada se sabira odnosno miksa sa drugim semplovima/signalima koji nisu propusteni kroz isti.

Evo jos malo wikipedije
http://en.wikipedia.org/wiki/Butterworth_filter
http://en.wikipedia.org/wiki/Category:Linear_filters
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