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| quote: | Originally posted by Trogdor
There's a BIG difference between the digital filter effects on mixers like the DJM-600 and DNX-1500, and the analog, fully controllable filters on an Allen & Heath. |
Indeed. Having manual filters on the DN-X1500 is really useful, seeing that you've kinda got best of both worlds, having both a similar set of effects to the DJM600 and having manual filters like the Xone mixers, but the manual filters on the DN-X1500 are nothing compared with the A&H.
Technically, a filter simply removes all frequencies of the sound either above or below a certain frequency, so cuts out the bass or cuts out the treble. As it is a true roll-off and not just a reduction in the volume, the sound is a lot more dramatic than just using EQ to a similar effect and you also have the ability to change the frequency at which the filter acts, allowing you to do a 'filter sweep' - gradually taking out more and more of the sound until only the very high frequencies remain. The good filters (like the A&H) also have added filter resonance, which is where the cutoff frequency is boosted by a certain amount, which gives a filter sweep a whooshing sound - making it sound extra cool 
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Stu Cox | 

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