why do filters only reach 16khz? Why not 20khz?

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staticcast
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Re: why do filters only reach 16khz? Why not 20khz?

Post by staticcast » Mon Jul 23, 2012 8:20 am

jrisreal wrote:
static_cast wrote:the reason why some filters don't go up as high as 20kHz is that it can be more difficult to design a filter algorithm that remains stable and sounds good as it gets close to the nyquist frequency (half the sample rate).

solution: get a better filter plugin, or increase the samplerate.

no, humans can't hear much above 20k. yes, filters that go up to 20k are necessary and useful. (no, not for wobble bass.)
If you increase the sample rate, how would the filter know? Like your username btw
plugins always know the host samplerate. they need to in order to work properly. whether the filter behaviour changes depends on the filter though.
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Re: why do filters only reach 16khz? Why not 20khz?

Post by jrisreal » Mon Jul 23, 2012 9:35 am

static_cast wrote:
jrisreal wrote:
static_cast wrote:the reason why some filters don't go up as high as 20kHz is that it can be more difficult to design a filter algorithm that remains stable and sounds good as it gets close to the nyquist frequency (half the sample rate).

solution: get a better filter plugin, or increase the samplerate.

no, humans can't hear much above 20k. yes, filters that go up to 20k are necessary and useful. (no, not for wobble bass.)
If you increase the sample rate, how would the filter know? Like your username btw
plugins always know the host samplerate. they need to in order to work properly. whether the filter behaviour changes depends on the filter though.
Er...that's what I meant. Was typing a quick response. Does WOW change its behavior?
...in my opinion
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staticcast
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Re: why do filters only reach 16khz? Why not 20khz?

Post by staticcast » Mon Jul 23, 2012 9:51 am

jrisreal wrote:
static_cast wrote:
jrisreal wrote:
static_cast wrote:the reason why some filters don't go up as high as 20kHz is that it can be more difficult to design a filter algorithm that remains stable and sounds good as it gets close to the nyquist frequency (half the sample rate).

solution: get a better filter plugin, or increase the samplerate.

no, humans can't hear much above 20k. yes, filters that go up to 20k are necessary and useful. (no, not for wobble bass.)
If you increase the sample rate, how would the filter know? Like your username btw
plugins always know the host samplerate. they need to in order to work properly. whether the filter behaviour changes depends on the filter though.
Er...that's what I meant. Was typing a quick response. Does WOW change its behavior?
no idea.

if you own ableton, load up an EQ8 and set a LPF pole to a high cutoff frequency (18kHz or something). then right click the effect title bar and select "high quality" and look at the difference in the frequency response graph. high quality mode just turns on oversampling (i think by 2x).
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Re: why do filters only reach 16khz? Why not 20khz?

Post by lucozade » Mon Jul 23, 2012 6:25 pm

jrisreal wrote:
static_cast wrote:
jrisreal wrote:
static_cast wrote:the reason why some filters don't go up as high as 20kHz is that it can be more difficult to design a filter algorithm that remains stable and sounds good as it gets close to the nyquist frequency (half the sample rate).

solution: get a better filter plugin, or increase the samplerate.

no, humans can't hear much above 20k. yes, filters that go up to 20k are necessary and useful. (no, not for wobble bass.)
If you increase the sample rate, how would the filter know? Like your username btw
plugins always know the host samplerate. they need to in order to work properly. whether the filter behaviour changes depends on the filter though.
Er...that's what I meant. Was typing a quick response. Does WOW change its behavior?

i dunt care wat u say blud.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by Artie_Fufkin » Fri Jul 27, 2012 11:00 pm

Maybe try turning up the resonance or changing the slope of your filter? Or get a different filter. Or some mild distortion and eq'ing. Or pitching up your percussion. Or not using low pass filters on high hats?... I'm confused now, what are you doing that for?

And bigup virtualmark. Try to read his posts as neutral as you can guys, he's only trying to help you and/or spark up a healthy debate. At the end of the day, interpret things how you want to and make sounds that sound good to your ears.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by MassAphekt » Sat Jul 28, 2012 12:46 am

thanks for summarizing what has been suggested artie, really
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Re: why do filters only reach 16khz? Why not 20khz?

Post by Artie_Fufkin » Sat Jul 28, 2012 1:35 am

I don't remember anyone saying anything about resonance, slopes or distortion. Oh also, you could use the pitch changer in audacity! ;)

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Re: why do filters only reach 16khz? Why not 20khz?

Post by arktrix45hz » Sat Jul 28, 2012 6:19 am

VirtualMark wrote:This is a common myth - as far as i'm aware no scientific evidence proves that we can hear outside of the normal hearing range. If you have any links to any credible studies, i'd be interested to read them.
LOL

You don't have to hear sound to perceive it.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by VirtualMark » Sat Jul 28, 2012 9:35 am

Artie Fufkin wrote: And bigup virtualmark. Try to read his posts as neutral as you can guys, he's only trying to help you and/or spark up a healthy debate. At the end of the day, interpret things how you want to and make sounds that sound good to your ears.
Thanks Artie - you made it into the red part of the pie chart. :)

I just look for the truth in each situation. As opposed to what i might believe or what a friend said, etc.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by Augment » Sat Aug 04, 2012 3:10 pm

Neuro Fiend wrote:
JTMMusicuk wrote:yeah the only thing to do really is find a new filter, i dont think using an eq to bring up the high end is a good idea though cos it might cause some phasing problems
I'm confused by what you mean... Boosting high end wouldn't really cause phasing problems, yeah EQs put some phase to the boosted area but it is in no way a problem in the case of adding some high end on a bass sound or snare drum for example. The main problem with this would be trying to boost frequencies which have been removed (or there abouts) as the content isn't there so it just won't sound good.

OP you could try any of the following filters:

tone2 bi-filter
fabfilter volcano
vengeance sound philta
ohmforce quad fromage


If you own reaktor there are also countless types of filters that come with that and even more on the user library.
Well, you cant remove any frequencies with filters or eq's, so that wont be a problem. You can only lower them, eventuallt until you cant really hear them anymore, but they will still be there
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Re: why do filters only reach 16khz? Why not 20khz?

Post by Brian Oblivion » Sat Aug 04, 2012 3:45 pm

blinkesko wrote:
Neuro Fiend wrote:
JTMMusicuk wrote:yeah the only thing to do really is find a new filter, i dont think using an eq to bring up the high end is a good idea though cos it might cause some phasing problems
I'm confused by what you mean... Boosting high end wouldn't really cause phasing problems, yeah EQs put some phase to the boosted area but it is in no way a problem in the case of adding some high end on a bass sound or snare drum for example. The main problem with this would be trying to boost frequencies which have been removed (or there abouts) as the content isn't there so it just won't sound good.

OP you could try any of the following filters:

tone2 bi-filter
fabfilter volcano
vengeance sound philta
ohmforce quad fromage


If you own reaktor there are also countless types of filters that come with that and even more on the user library.
Well, you cant remove any frequencies with filters or eq's, so that wont be a problem. You can only lower them, eventuallt until you cant really hear them anymore, but they will still be there
no, you can remove frequencies with eqs and filters. Also, is someone before suggesting you shouldnt boost an eq because it causes phase problems? Phase with what exactly? Do you think they invented eqs that boost so that you couldnt use them because they might phase with.... something? Are you really telling me you shouldnt use an eq to add a bit more high end when you want more high end? Is that not exactly what it was invented for?

I do worry about this forum sometimes.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by JTMMusicuk » Sat Aug 04, 2012 3:57 pm

Its not a case that using boost causes the phase itself but that the reason you would want to eq for the most part is for clashing frequencies, if you have a guitar and a vocal part clashing with the same frequencies then its better to cut from either the guitar or vocal so those frequencies are no longer clashing rather than boosting certain frequencies in one part and leaving them to clash with each other in the background.
Obviously if you just want a bit extra high end on your drums then boost or cut depending on what sounds good but id still rather cut just for good practise. I still dont understand phasing massively but talk to Macc he knows everything i swear

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Re: why do filters only reach 16khz? Why not 20khz?

Post by Augment » Sat Aug 04, 2012 4:40 pm

Brian Oblivion wrote:
blinkesko wrote:
Neuro Fiend wrote:
JTMMusicuk wrote:yeah the only thing to do really is find a new filter, i dont think using an eq to bring up the high end is a good idea though cos it might cause some phasing problems
I'm confused by what you mean... Boosting high end wouldn't really cause phasing problems, yeah EQs put some phase to the boosted area but it is in no way a problem in the case of adding some high end on a bass sound or snare drum for example. The main problem with this would be trying to boost frequencies which have been removed (or there abouts) as the content isn't there so it just won't sound good.

OP you could try any of the following filters:

tone2 bi-filter
fabfilter volcano
vengeance sound philta
ohmforce quad fromage


If you own reaktor there are also countless types of filters that come with that and even more on the user library.
Well, you cant remove any frequencies with filters or eq's, so that wont be a problem. You can only lower them, eventuallt until you cant really hear them anymore, but they will still be there
no, you can remove frequencies with eqs and filters. Also, is someone before suggesting you shouldnt boost an eq because it causes phase problems? Phase with what exactly? Do you think they invented eqs that boost so that you couldnt use them because they might phase with.... something? Are you really telling me you shouldnt use an eq to add a bit more high end when you want more high end? Is that not exactly what it was invented for?

I do worry about this forum sometimes.
Filters and eq's lower the volume of x frequency, but doesnt remove said frequency.
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Re: why do filters only reach 16khz? Why not 20khz?

Post by Brian Oblivion » Sat Aug 04, 2012 5:52 pm

blinkesko wrote:
Brian Oblivion wrote:
blinkesko wrote:
Neuro Fiend wrote:
JTMMusicuk wrote:yeah the only thing to do really is find a new filter, i dont think using an eq to bring up the high end is a good idea though cos it might cause some phasing problems
I'm confused by what you mean... Boosting high end wouldn't really cause phasing problems, yeah EQs put some phase to the boosted area but it is in no way a problem in the case of adding some high end on a bass sound or snare drum for example. The main problem with this would be trying to boost frequencies which have been removed (or there abouts) as the content isn't there so it just won't sound good.

OP you could try any of the following filters:

tone2 bi-filter
fabfilter volcano
vengeance sound philta
ohmforce quad fromage


If you own reaktor there are also countless types of filters that come with that and even more on the user library.
Well, you cant remove any frequencies with filters or eq's, so that wont be a problem. You can only lower them, eventuallt until you cant really hear them anymore, but they will still be there
no, you can remove frequencies with eqs and filters. Also, is someone before suggesting you shouldnt boost an eq because it causes phase problems? Phase with what exactly? Do you think they invented eqs that boost so that you couldnt use them because they might phase with.... something? Are you really telling me you shouldnt use an eq to add a bit more high end when you want more high end? Is that not exactly what it was invented for?

I do worry about this forum sometimes.
Filters and eq's lower the volume of x frequency, but doesnt remove said frequency.

if you lower the volume of said frequency to zero it is then removed, you can make a track completely silent using nothing but filters, as in every single point sitting flat on zero, thats removing every frequency completely. So its not true that you cant remove a frequency with eqs or filters. Its unlikely if there was any audible sound there that you could wipe it out with 1 filter or eq cut with most vsts, thats true.

As for phase, yeah fair play, if it sounds fine on its own but not in the mix then def look at whats clashing etc and do some eq cutting to make room. But if the sound on its own just lacks low or high end boost it with an eq, I see a lot of people saying their bass patches lack lows and highs, yet theyre using synths with low and high shelf boost controls and not using them because theyve been told its wrong somewhere. Sometimes you just need to boost the hell out of something, it happens, thats why the put a shelf/eq in your synth.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by Augment » Sat Aug 04, 2012 7:40 pm

...filters and eq's work by lowering volume. If you lower a frequency by 200db, it will still be there, only it will be 200db lower. There's no such thing as it hitting 0 and being completely gone
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Re: why do filters only reach 16khz? Why not 20khz?

Post by Brian Oblivion » Sat Aug 04, 2012 8:43 pm

blinkesko wrote:...filters and eq's work by lowering volume. If you lower a frequency by 200db, it will still be there, only it will be 200db lower. There's no such thing as it hitting 0 and being completely gone

...yes there is, if you look at a wav there is a centre line that is absolute zero, if your sound doesnt raise any points off that line it is absolute silence.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by JTMMusicuk » Sat Aug 04, 2012 9:38 pm

Brian Oblivion wrote:
blinkesko wrote:...filters and eq's work by lowering volume. If you lower a frequency by 200db, it will still be there, only it will be 200db lower. There's no such thing as it hitting 0 and being completely gone

...yes there is, if you look at a wav there is a centre line that is absolute zero, if your sound doesnt raise any points off that line it is absolute silence.
He is honestly right, look at it this way - the plugin cant alter the origional data (the sample, synth etc.) by erasing parts because if you then want to turn the eq back up it wouldnt have any data there so all it can do is turn it down by an amount of decibels so it just seems like it is completely gone when it is all the way down.

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Re: why do filters only reach 16khz? Why not 20khz?

Post by Augment » Sat Aug 04, 2012 9:39 pm

Brian Oblivion wrote:
blinkesko wrote:...filters and eq's work by lowering volume. If you lower a frequency by 200db, it will still be there, only it will be 200db lower. There's no such thing as it hitting 0 and being completely gone

if you look at a wav there is a centre line that is absolute zero, if your sound doesnt raise any points off that line it is absolute silence.
Correct, but you cant remove a frequency. If it is at 0, then it was never there. All you cn do is lower the volume of the frequency until u cant hear it anymore, but it will still be there
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Re: why do filters only reach 16khz? Why not 20khz?

Post by jrisreal » Sat Aug 04, 2012 9:45 pm

Blinkesko is right
...in my opinion
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Re: why do filters only reach 16khz? Why not 20khz?

Post by VirtualMark » Sat Aug 04, 2012 9:46 pm

blinkesko wrote:...filters and eq's work by lowering volume. If you lower a frequency by 200db, it will still be there, only it will be 200db lower. There's no such thing as it hitting 0 and being completely gone
Here's what i'm thinking, i might be wrong. The dynamic range of 24bit audio is 144db, so if you were to notch a frequency 144db or more then it should be totally gone. But if it were an analog eq then i guess that a trace amount of the frequency might always be there, not that you'd hear it.

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