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| quote: | Originally posted by UphoricNitemare
I think you are referring to cutoff frequency. It refers to the amount of frequency your cutting off. I suck at explaining things...someone else take this. |
The "cutoff" frequency control of a filter, controls the frequency at which all other frequencies in a given direction (based on the filter type) are attenuated (turned down). How much these frequencies are turned down depends once again on the type of filter. This is usually expressed in db (decibel) per octave cut (attenuation).
An example is badly need to debunk the above.. so here goes:
Commonly used in Trance is a 24 decibel per octave Low Pass Filter.
(to save real estate on a soft synth GUI, it may be abbreviated as such: LFP -24db)
Anyway, if the filter type is set to a 24db LPF, and the "cutoff" frequency is set to, say, 10khz, then frequencies below 10khz are not turned down at all (this is why it's called a low pass). But, frequencies above 10khz begin to be filtered out at 24db per octave. Using the 10k cutoff example, then the level at 500hz would be -24 db as half the original frequeny is an octave lower.
this link should provide a visual explanation: LPF & HPF Gain reponse diagram
So, set the oscilators on your synth to generate noise (preferably of the "white" variety) and experiment with different filter types (LPF,HPF,BPF), and strengths (6,12,24,36 db/octave), and then move the cutoff frequenccy until you get your desired swooshy effect.
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Marsh - Distance (405 Recordings)
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