I think it is.
I used to know all about this, but after not using it, I totally forgot...
Aren't X poles defined in frequency vs phase diagram?
Filter Poles - what are they?
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- KVRAF
- Topic Starter
- 10597 posts since 13 Jun, 2004 from Alberto Balsam
Yes it is. Making filters in parametric EQ will teach you a lot about filters - except for the terminology!Ocean Zen wrote:And resonance?
Is that the little bump before the slope down?
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Voidoid Surrealist Voidoid Surrealist https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=41079
- KVRAF
- 4048 posts since 18 Sep, 2004 from Places far less tedious than this blue trainwreck...
Ok, I get "Numbered" pole filters just fine, but what is an "all-pole
filter"?
filter"?
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Stupid American Pig Stupid American Pig https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=4753 - KVRAF
- 7065 posts since 25 Nov, 2002 from not sure
You forgot to mention it would "filter out" the sun, rain and insects to varying degrees.Meffy wrote:When a tent has X poles, it means it will be easy to fold for carrying and storage.
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Voidoid Surrealist Voidoid Surrealist https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=41079
- KVRAF
- 4048 posts since 18 Sep, 2004 from Places far less tedious than this blue trainwreck...
I seem to recall that's it's some sort of bandpass filter. I hear it referred to a lot in speech synthesis.shamann wrote:All-pass filter? I am not familiar otherwise with all-pole.
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Voidoid Surrealist Voidoid Surrealist https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=41079
- KVRAF
- 4048 posts since 18 Sep, 2004 from Places far less tedious than this blue trainwreck...
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- KVRAF
- Topic Starter
- 10597 posts since 13 Jun, 2004 from Alberto Balsam
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- KVRAF
- 12235 posts since 18 Aug, 2003
Well in speech synthesis, all-pole models would be useful for many speech sounds (excluding those with stops/zeros like fricatives, nasal sounds, glottal stops, etc - p,b,n,m,g,k,etc).
The filter stuff from there would be based on DSP and transfer functions, admittedly something of which I know very little.
According to the fabulous Julius Orion Smith:
Every digital filter can be specified by its poles and zeros (plus a gain factor). Poles and zeros give useful insights into a filter's response, and can be used as the basis for digital filter design.
The filter stuff from there would be based on DSP and transfer functions, admittedly something of which I know very little.
According to the fabulous Julius Orion Smith:
Every digital filter can be specified by its poles and zeros (plus a gain factor). Poles and zeros give useful insights into a filter's response, and can be used as the basis for digital filter design.
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- KVRAF
- 2548 posts since 7 Jul, 2003 from Huntington, WV
I believe there are different types of filters with all poles and no zeros. A Butterworth filter is one such filter. It's advantage is maximal flatness of response curve, within the passband area. It was used a lot in crossover filters. They can be designed as either lowpass or highpass configurations. I'm not sure about other configurations, but they might also be possible. I think I remember reading about a parameteric Butterworth filter somewhere, which you would expect to give bandpass and bandreject responses.
As always, the more poles, the steeper the cutoff slope.
One thing you people aren't mentioning so far is that the attenuation doesn't keep increasing infinitely -- at least not in a hardware filter. There is eventually a maximum level of attenuation which is reached. That level will vary with filter type, and it is also possible to have ripples in the response curve above the point of maximum attentuation. Like I said, this applies to common hardware filters. I don't know if it applies to digital filters in the same way.
take care,
McLilith
As always, the more poles, the steeper the cutoff slope.
One thing you people aren't mentioning so far is that the attenuation doesn't keep increasing infinitely -- at least not in a hardware filter. There is eventually a maximum level of attenuation which is reached. That level will vary with filter type, and it is also possible to have ripples in the response curve above the point of maximum attentuation. Like I said, this applies to common hardware filters. I don't know if it applies to digital filters in the same way.
take care,
McLilith
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- KVRAF
- 4265 posts since 21 Oct, 2001 from my bolthole in the south pacific
While we usually talk about filters in the context of synthesis, filters are everywhere.
In simple circuits like tube guitar amps or power supplies you see single pole RC filters everywhere. One Capacitor and one Resistor can (depending on the configuration) give a single pole high pass or a low pass filter - ie with a slope of 6 dB per octave.
The AC ripple smoothing circuit in your tube amps high voltage DC power supply is just a few single pole low pass filters in series.
In the passive crossover circuit of two way speakers you often see 2 and 3 pole high and low pass filters built from a suitable configuration of capacitors and coils.
In simple circuits like tube guitar amps or power supplies you see single pole RC filters everywhere. One Capacitor and one Resistor can (depending on the configuration) give a single pole high pass or a low pass filter - ie with a slope of 6 dB per octave.
The AC ripple smoothing circuit in your tube amps high voltage DC power supply is just a few single pole low pass filters in series.
In the passive crossover circuit of two way speakers you often see 2 and 3 pole high and low pass filters built from a suitable configuration of capacitors and coils.