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 Kyma Forum
 Confabulation
 Ultrasonic hearing capabilities.
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| Author | Topic: Ultrasonic hearing capabilities. |
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armand Member |
posted 03 December 2000 17:25
 
Hi!, I like to know if anyone of you make use of the high sample rate's from the Capybara 320.Are there great audible differences, what's your opinion and experience? IP: Logged |
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gelauffc Member |
posted 07 December 2000 08:20
Hi Armand, I can give you my opinion: I think those high sampling frequencies are for hifi ears only. A normal (and jong) person can not hear beyond 20kHz. We can make very lengthy discussions about this, but it is not worth it. I find it handy to test if a kymasound suffers from alias distortion. Going to the higher SampleFrequency gives us some more spectral space to mess in. Normally I do not use it, because I only have a basic 320 system. Christiaan Gelauff IP: Logged |
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armand Member |
posted 08 December 2000 14:03
Hi Christiaan, Your right about this topic, it's a waste of time to make lengthy discussions. And it's very simple about the sample rate the higher the better. And of cource I know about the 20kHz theory, well my suggestion is trust your ears. regards Armand. IP: Logged |
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opiumeater Member |
posted 28 February 2001 11:37
I can tell the diffrence, but others either dont care or cant tell any diffrence at all. I hear some pretty anoying noises that others cant hear and it drives me nutz. Everyone I know that makes music has good ears. But as for the normal joe, higher sample rates dont make any diffrence. I like to have total clean and crisp sound and everyone else I know can listen to it on a clock radio and it would be the same to them. IP: Logged |
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gelauffc Member |
posted 06 March 2001 02:37
quote: Hi opiumeater, On what fact do you base you can tell the difference? Do not mistake to say: I hear a difference when doing synthesis, because I would think someone can here that very easely. But this is not because of the higher frequencies! It is probebly because of less aliasing in the audible spectrum! Myself seem to hear quiet good compared to about 30 other people from my work. We regularly do listening tests on coded audio. But the highest frequency I hear is about 19kHz (which is not bad for a 27 year old). Christiaan [This message has been edited by gelauffc (edited 06 March 2001).] IP: Logged |
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Frank Kruse Member |
posted 06 March 2001 06:19
a friend of mine is working on his thesis on real time 5.1 convolution of mesured impulse responses for creating natural reverb at the "deutsche grammophon" record company that does itīs own development on new recording techniques of classic musik. he told me that allmost all of the engineers there have the opinion that the effect of using high quality cables has more effect than using 96kHz or even higher for recording purposes. frank. IP: Logged |
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David McClain Member |
posted 06 March 2001 13:23
In my own hearing restoration research, I have found that even I can tell the difference between identical processing running at 20 KHz sample rate, and that done at 48 KHz. The noticeable differences are found among high string sounds. At the lower sampling rates they appear to sound like crunchy "gravel", whereas with identical algorithms and higher sample rate processing they seem sweet and rich. I can't tell much difference, however, betweeen 48 KHz and 96 KHz. - DM IP: Logged |
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armand Member |
posted 06 March 2001 17:22
Hello everybody, Well I'm 29 year and my conscious perception stops at 19 kHz (with steady test signals). And the difference what I heard with music is air, space, texture, edges and dramatic soundstanging (somehow my ears are interested for hifi). This fact is based on what I hear with acoustic instruments and analogue synthesis. And Christiaan what you told of less aliasing makes total sence. I also heard from somebody that some Japanese researchers who used ECG equipment (infrasonic sound), and the brain patterns are the same ones when people were very happy or ecstatic. Frank the "effect"... THE ULTIMATE CRITERION for sound reproduction is that the human ear is fooled by the overall system into "thinking" it has heard the real thing. So enough Holy Grail talk. Armand. IP: Logged |
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pete Member |
posted 06 March 2001 19:18
I think one of the problems on doing tests with sample rates is that the rate of conversion is not the only factor. All DtoA converters have to have analogue filters after conversion. There is no such thing as a perfect filter and there is always a compromise between how much of the high frequency will be removed and how much aliasing will be allowed through. If people are hearing a horrable noise at the hf then this could be removed by bringing down the cut off frequency. What I expected the results of a comparison between 48Khz and 96Khz, is that (if anything) people would complain that with 48Khz ,something is missing up top, and not "I can hear a noise". I promis you that if you were to bring to cut off frequency down to 100 hz, you would not hear any noises up top; you wouldn't hear much of any thing else up top either though. So what 96Khz gives you is the ability to raise the cutoff frequency and therefore hear more sound but is it worth cutting you cappy in half and throwing one half of the prosseing power away. If you have more the dobble the prosseing that you could ever use then use 96Khz all the time, but I don't know many people in that position. IP: Logged |
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armand Member |
posted 07 March 2001 12:37
Hi Frank, Maybe this link got some information about a realtime reverberation. a Lexicon LARES (Lexicon Acoustic Reinforcement & Enhancement System) www.lares-lexicon.com IP: Logged |
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Frank Kruse Member |
posted 07 March 2001 12:49
hi armand! the guys at the deutsche grammophon are using a device from australia that seems to be the fastest in doing this. sony sells this new reverb machine that does similar things but only stereo. frank. IP: Logged |
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