Stupid EQ question from a dummy...
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A_Gruesome_Discovery A_Gruesome_Discovery https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=10647
- KVRist
- 66 posts since 27 Nov, 2003 from Boston, MA
I was engaging in the dangerous act of thinking way too hard just now, so bear with me. My question is this: When I cut, say, 5dB at 500Hz for example, will that cut 5dB from 500Hz always, regardless of amplitude? For instance, if the signal is currently at -15dB, is 5dB @ 500Hz cut from that?... but then, if the signal jumps up to -3db, is it still 5dB being cut from that? What's the relationship? And is there a point at which the signal is low enough that no attenuation will take place? Is it a relative value, or absolute? Is it linear throughout the dB scale, or is there variation in the actual dB amount as you approach very low levels?
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- KVRAF
- 1933 posts since 29 Apr, 2005 from Beyond all space, time, and dimension.
Interesting questions but I know there are "dynamic" EQ's as opposed to static ones.A_Gruesome_Discovery wrote:I was engaging in the dangerous act of thinking way too hard just now, so bear with me. My question is this: When I cut, say, 5dB at 500Hz for example, will that cut 5dB from 500Hz always, regardless of amplitude? For instance, if the signal is currently at -15dB, is 5dB @ 500Hz cut from that?... but then, if the signal jumps up to -3db, is it still 5dB being cut from that? What's the relationship? And is there a point at which the signal is low enough that no attenuation will take place? Is it a relative value, or absolute? Is it linear throughout the dB scale, or is there variation in the actual dB amount as you approach very low levels?
Here is my small version:
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- KVRist
- 107 posts since 4 Feb, 2005
Since the db scale is actually logarithmic, subtracting dbs is actually equivalent to multiplying the waveform amplitude with a factor < 1, ie bringing the "peaks and valleys" closer to the zero line with a certain percentage. That is why you can cut X dbs from an already really silent waveform and it still makes sense.
(nothing to do with eq, just a general observation)
(nothing to do with eq, just a general observation)
