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What is a Hipass filter and...
What is a Hipass filter, where might I find one, and can it be used
(like an effects box) on a Korg 16 Track digital recorder (a stand alone digital HD recorder as opposed to a PC based set up) Thanks! |
#2
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"Dr. Alan J. Lipman" wrote in message
om... What is a Hipass filter, where might I find one, and can it be used (like an effects box) on a Korg 16 Track digital recorder (a stand alone digital HD recorder as opposed to a PC based set up) A high-pass filter is something that lets high-frequency signals through, and attenuates the lower-frequency signals. The "treble" control on a stereo is one sort of high-pass filter. You can use a graphic equalizer, set with the lower bands turned down and the higher bands turned up. Or you can use a "parametric equalizer", which lets you pick a particular frequency point and decide how much you want the frequencies above (or below, if you choose) to be boosted. These days practically any effect is available both in hardware (a standalone box that you plug cables into) and in software (for which you would need to use a PC). On the Korg, if you use a hardware device, you can probably play back the one channel, sending its output into the filter, and then go from the filter's output back into another channel input on the Korg and record onto a new track. To figure out what words you sang, concentrate on boosting the frequencies around 2kHz to 5kHz - that's where a lot of the articulation between different consonants is. Frequencies much higher than that probably aren't going to help you hear what's going on. |
#3
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Dr. Alan J. Lipman wrote:
What is a Hipass filter, where might I find one, and can it be used (like an effects box) on a Korg 16 Track digital recorder (a stand alone digital HD recorder as opposed to a PC based set up) Before one attempts to describe the medicine you seek to self-prescribe here, perhaps you could tell us exactly what you wish to accomplish, what problem you seek to solve. I've been sneezing more lately and was thinking some elemental brain sugery, something I could do myself, might help. A doctor friend advised against it and suggested since I'd been chainsawing cedar for firewood, perhaps just blowing my nose more often would alleviate my malady. What do you need to do, Doc? -- ha |
#4
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Walter Harley wrote:
The "treble" control on a stereo is one sort of high-pass filter. ??? -- ha |
#5
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#6
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"hank alrich" wrote in message .. . Walter Harley wrote: The "treble" control on a stereo is one sort of high-pass filter. ??? -- ha When I read this is made since to me, because my first couple stereos were very inexpensive models that only had a single 'tone' control, which I'm pretty sure were just some sort of passive low pass ( counter clockwise from center ) high pass ( clockwise from center ) filters. John L Rice |
#7
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On Sun, 5 Dec 2004 21:31:03 -0800, "John L Rice"
wrote: When I read this is made since to me, because my first couple stereos were very inexpensive models that only had a single 'tone' control, which I'm pretty sure were just some sort of passive low pass ( counter clockwise from center ) high pass ( clockwise from center ) filters. And of course Hank's right that this isn't what most folks here would call a "high pass filter" and wouldn't be usable as one. But your description of a "tone control" rings true to me because I've been playing with the idea of such in a homebrew Geetar amplifier. In the hi-fi-world-of-the-future (or maybe the past) the hallowed all-caps firm of QUAD included a one-knob tone control with that "tilt" control. Elegant for its intended use. Any thoughts on the best use of a stray pot in a guitar amplifier are certainly eagerly welcomed. Somewhere in the middle of a 12AX7 preamp stage, maybe? Much thanks, Chris Hornbeck "Shi mian mai fu" |
#8
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"Dr. Alan J. Lipman" wrote in message
om What is a Hipass filter, where might I find one, and can it be used (like an effects box) on a Korg 16 Track digital recorder (a stand alone digital HD recorder as opposed to a PC based set up) I high pass filter is exactly what the words say - its a filter that passes high frequencies, and by implication does not pass low frequencies. You can find a wide variety of high pass filters in various audio editing software. Adobe Audition has a ton of different ones that work different ways, do different things, and are highly adjustable. It's PC software, but it probably makes the kinds of changes to the tonality of music that you want. |
#9
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#10
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On Sun, 5 Dec 2004 21:31:03 -0800, "John L Rice"
wrote: When I read this is made since to me, because my first couple stereos were very inexpensive models that only had a single 'tone' control, which I'm pretty sure were just some sort of passive low pass ( counter clockwise from center ) high pass ( clockwise from center ) filters. snip Not. Cheapie stereos, including most car crap, had "tone" controls which were simply high cut filters. "Flat" response usually meant (and still does) cranked full clockwise. The "knee" frequency of such single element tone controls was usually a bit lower than more sophisticated Baxandall controls (bass/treble cut/boost), so the user could, if they wanted "bass boost," cut the control way down and then just boost the gain. dB |
#11
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What is a Hipass filter, where might I find one, and can it be used
(like an effects box) on a Korg 16 Track digital recorder (a stand alone digital HD recorder as opposed to a PC based set up) A high-pass filter is something that lets high-frequency signals through, and attenuates the lower-frequency signals. The "treble" control on a stereo is one sort of high-pass filter. The BASS control is more accurately a high-pass filter. It can attenuate the low frequencies and let the highs 'pass.' The treble control could be called a low-pass filter for the opposite reason. But I'm just being picky. I should lurk more. :-) -John O |
#12
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"hank alrich" wrote in message
.. . Walter Harley wrote: The "treble" control on a stereo is one sort of high-pass filter. ??? Sorry, was thinking about Baxandall controls (where the treble is either high boost or high cut depending on how it's set). I was trying to give him a sense of "turn the knob up and the highs go up compared to the lows." You're right, a cut-only bass control ("turn the knob down and the bass goes down") is a more clear example. Unless it's in the context of a system with otherwise inflated bass response, like most systems these days, so that "all the way up" is actually boosting the bass. Probably tone controls are a bad example in general. In lieu of a well-defined unity gain point, anything with an overall rising response can be called a highpass, and anything with an overall falling response can be called lowpass. |
#13
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DeserTBoB wrote:
What is a Hipass filter snip I'm assuming (big assumption) you mean a HIGH PASS filter, not a "hip ass" filter. By definition, a high pass filter is one which allows frequencies higher than the "knee" frequency, the set point for attentuation, to pass unaltered, while everything below that would be attenuated at a rate of so many dB/octave. Yep, ironically a high-pass filter is rarely the hip-ass filter. More often a low-pass filter with a fair amount of resonance is hipper, sometimes a band-pass filter as well. The high-pass is more utilitarian, in my book. Andrew Leavitt |
#14
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DeserTBoB wrote:
What is a Hipass filter snip I'm assuming (big assumption) you mean a HIGH PASS filter, not a "hip ass" filter. By definition, a high pass filter is one which allows frequencies higher than the "knee" frequency, the set point for attentuation, to pass unaltered, while everything below that would be attenuated at a rate of so many dB/octave. Yep, ironically a high-pass filter is rarely the hip-ass filter. More often a low-pass filter with a fair amount of resonance is hipper, sometimes a band-pass filter as well. The high-pass is more utilitarian, in my book. Andrew Leavitt |
#15
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DeserTBoB wrote:
What is a Hipass filter snip I'm assuming (big assumption) you mean a HIGH PASS filter, not a "hip ass" filter. By definition, a high pass filter is one which allows frequencies higher than the "knee" frequency, the set point for attentuation, to pass unaltered, while everything below that would be attenuated at a rate of so many dB/octave. Yep, ironically a high-pass filter is rarely the hip-ass filter. More often a low-pass filter with a fair amount of resonance is hipper, sometimes a band-pass filter as well. The high-pass is more utilitarian, in my book. Andrew Leavitt |
#16
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On Mon, 06 Dec 2004 13:15:51 GMT, "John O"
wrote: The BASS control is more accurately a high-pass filter. It can attenuate the low frequencies and let the highs 'pass.' snip True through 49.999% of the operable range, but what happenes when you get bass boost from a Baxandall arrangement? The treble control could be called a low-pass filter for the opposite reason. snip Again, 49.999% of the time. But I'm just being picky. I should lurk more. :-) snip Good point that was 49.999% accurate. dB |
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