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What's the point of higher sampling rates in audio?, Such as 96 and 192kHz.
stranhoROX
post Oct 16 2011, 18:03
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Could someone explain to me why there are some recordings with sample rates as high as 192kHz? If most of us hear up to 20kHz, wouldn't 44.1kHz or even 48kHz be enough? Or is there other practical aspects besides boosting maximum frequency in higher sampling rates I am not aware of?
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Roseval
post Nov 8 2011, 00:01
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Nyquist in reverse

One should sample at the double of the highest frequency.
The reverse holds too, if you sample at 44, there shouldn't be any signal above 22kHz in the source.
Practical consequence, the input must be band limited.
If you want to cover everything up to 20 kHz, the only thing you can do is using a pretty steep low pass filter (brick wall).
In general this type of filter produces artifacts like pre-ringing.

If you sample at 88, your problems remain the same, no frequency above Nyquist please.
This time our Nyquist is 44.
We might decide to use a brick wall again but this time it is much farther out of our audible range so probably has less impact.

As the late Julian Dunn phrased it
A direct effect of the higher sampling rate is that for an identical filter design the time
displacements will scale inversely with sample rate. Hence an improvement can be
made just from raising the sample rate - even for those who cannot hear above
20kHz.


There isn't much musical energy at this level.
We also might decide to use a smoother low pass filter e.g. starting at 30 kHz.

There might indeed be a (small) benefit using higher sample rates.

BTW: James Boyk measured a couple of instruments demonstrating that not only cymbals produces sound above 20 kHz
http://www.cco.caltech.edu/~boyk/spectra/spectra.htm

This post has been edited by Roseval: Nov 8 2011, 00:12


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- stranhoROX   What's the point of higher sampling rates in audio?   Oct 16 2011, 18:03
- - C.R.Helmrich   Good question! My answer: People record with 9...   Oct 16 2011, 18:18
|- - punkrockdude   QUOTE (C.R.Helmrich @ Oct 16 2011, 19:18)...   Oct 18 2011, 21:13
- - Brand   Yeah, this has been discussed a lot on HA. But in...   Oct 16 2011, 18:29
|- - saratoga   QUOTE (Brand @ Oct 16 2011, 13:29) Howeve...   Oct 16 2011, 21:32
- - benski   There are some advantages to recording, mixing and...   Oct 16 2011, 20:38
- - Canar   Trivial case where higher-sampling rates can becom...   Oct 16 2011, 21:50
|- - Notat   +1 to saratoga Canar's scenario is applicable...   Oct 16 2011, 22:48
|- - krabapple   QUOTE (Notat @ Oct 16 2011, 17:48) There ...   Oct 17 2011, 03:57
- - Juha   Still there are plenty of audiointerfaces which wo...   Oct 17 2011, 04:14
- - 2Bdecided   @benski, ...but if you're simply relying on t...   Oct 17 2011, 10:07
|- - benski   QUOTE (2Bdecided @ Oct 17 2011, 05:07) @b...   Oct 17 2011, 11:47
|- - Northpack   QUOTE (benski @ Oct 17 2011, 10:47) And i...   Oct 17 2011, 16:34
||- - 2Bdecided   QUOTE (Northpack @ Oct 17 2011, 16:34) QU...   Oct 18 2011, 11:26
||- - Dirk95100   QUOTE (2Bdecided @ Oct 18 2011, 12:26) An...   Oct 18 2011, 12:33
|||- - 2Bdecided   QUOTE (Dirk95100 @ Oct 18 2011, 12:33) QU...   Oct 18 2011, 14:46
|||- - Dirk95100   QUOTE (2Bdecided @ Oct 18 2011, 15:46) QU...   Oct 19 2011, 05:35
||||- - saratoga   QUOTE (Dirk95100 @ Oct 19 2011, 00:35) ht...   Oct 19 2011, 05:51
|||||- - Dirk95100   QUOTE (saratoga @ Oct 19 2011, 06:51) QUO...   Oct 19 2011, 08:42
|||||- - SebastianG   QUOTE (Dirk95100 @ Oct 19 2011, 09:42) An...   Oct 19 2011, 09:38
||||- - 2Bdecided   QUOTE (Dirk95100 @ Oct 19 2011, 05:35) ht...   Oct 19 2011, 11:01
||||- - Dirk95100   QUOTE (2Bdecided @ Oct 19 2011, 12:01) QU...   Oct 19 2011, 12:50
||||- - SebastianG   QUOTE (Dirk95100 @ Oct 19 2011, 13:50) Wh...   Oct 19 2011, 13:52
||||- - pdq   QUOTE (Dirk95100 @ Oct 19 2011, 07:50) Wh...   Oct 19 2011, 14:00
|||- - Woodinville   QUOTE (2Bdecided @ Oct 18 2011, 06:46) 1)...   Oct 19 2011, 07:45
||- - krabapple   QUOTE (2Bdecided @ Oct 18 2011, 06:26) Th...   Oct 18 2011, 23:10
||- - 2Bdecided   QUOTE (krabapple @ Oct 18 2011, 23:10) QU...   Oct 19 2011, 10:50
|- - dhromed   QUOTE (benski @ Oct 17 2011, 12:47) And i...   Oct 17 2011, 17:05
|- - knutinh   QUOTE (benski @ Oct 17 2011, 12:47) I...   Oct 17 2011, 18:34
|- - Dirk95100   QUOTE (knutinh @ Oct 17 2011, 19:34) QUOT...   Oct 18 2011, 05:06
- - Wombat   QUOTE (dhromed @ Oct 17 2011, 18:05) QUOT...   Oct 17 2011, 18:45
- - HTS   Do microphones have to be good enough to take adva...   Oct 18 2011, 03:45
|- - saratoga   QUOTE (HTS @ Oct 17 2011, 22:45) Otherwis...   Oct 18 2011, 03:47
- - FreaqyFrequency   There are, in fact, at least two omni capsules out...   Oct 18 2011, 04:12
- - hellokeith   Seems like a worthwhile experiment would be to run...   Oct 18 2011, 07:14
- - unekdoud   QUOTE (stranhoROX @ Oct 17 2011, 01:03) C...   Oct 18 2011, 08:01
- - Cavaille   Guys, you all disappoint me. The point of higher s...   Oct 18 2011, 13:34
|- - 2Bdecided   QUOTE (Cavaille @ Oct 18 2011, 13:34) Guy...   Oct 18 2011, 14:55
|- - saratoga   QUOTE (Cavaille @ Oct 18 2011, 08:34) Guy...   Oct 18 2011, 17:41
|- - C.R.Helmrich   QUOTE (Cavaille @ Oct 18 2011, 14:34) It ...   Oct 18 2011, 22:42
||- - hellokeith   QUOTE (C.R.Helmrich @ Oct 18 2011, 16:42)...   Oct 19 2011, 05:30
||- - C.R.Helmrich   QUOTE (hellokeith @ Oct 19 2011, 06:30) Q...   Oct 19 2011, 15:50
|- - krabapple   QUOTE (Cavaille @ Oct 18 2011, 08:34) Guy...   Oct 18 2011, 23:26
|- - Slipstreem   QUOTE (Cavaille @ Oct 18 2011, 12:34) Thi...   Nov 8 2011, 02:01
- - Wombat   I love the steps forward high resolution movies co...   Oct 18 2011, 19:48
- - [JAZ]   And are you 100% sure that the plugin is samplerat...   Oct 18 2011, 22:09
|- - punkrockdude   QUOTE ([JAZ] @ Oct 18 2011, 23:09...   Nov 1 2011, 16:55
|- - Arnold B. Krueger   QUOTE ([JAZ] @ Oct 18 2011, 17:09...   Nov 1 2011, 21:44
|- - 2Bdecided   QUOTE (Arnold B. Krueger @ Nov 1 2011, 21...   Nov 2 2011, 12:32
||- - benski   QUOTE (2Bdecided @ Nov 2 2011, 07:32) A s...   Nov 2 2011, 15:40
|- - HTS   QUOTE (Arnold B. Krueger @ Nov 1 2011, 15...   Mar 20 2012, 03:35
|- - Woodinville   QUOTE (HTS @ Mar 19 2012, 19:35) Aren...   Apr 7 2012, 05:41
|- - knutinh   QUOTE (Woodinville @ Apr 7 2012, 06:41) H...   Apr 9 2012, 12:20
- - Juha   I bet most of these 16/44.1 fanatics rips/ripped t...   Oct 19 2011, 04:33
|- - krabapple   QUOTE (Juha @ Oct 18 2011, 23:33) I bet m...   Nov 15 2011, 17:29
|- - mjb2006   QUOTE (krabapple @ Nov 15 2011, 10:29) [2...   Nov 15 2011, 22:12
|- - krabapple   QUOTE (mjb2006 @ Nov 15 2011, 17:12) QUOT...   Nov 15 2011, 22:45
- - greynol   It has little to do with editing. People record a...   Oct 19 2011, 16:34
|- - Arnold B. Krueger   QUOTE (greynol @ Oct 19 2011, 11:34) It h...   Nov 1 2011, 15:08
- - greynol   That's great, Arny, though I don't know th...   Nov 1 2011, 16:48
|- - Arnold B. Krueger   QUOTE (greynol @ Nov 1 2011, 11:48) That...   Nov 1 2011, 21:27
|- - greynol   QUOTE (Arnold B. Krueger @ Nov 1 2011, 13...   Nov 1 2011, 22:16
- - 2Bdecided   Yes, I agree. Sorry, that's what I was implyin...   Nov 2 2011, 16:18
- - astroidmist   I don't know if this has been posted or addres...   Nov 7 2011, 07:00
- - Roseval   Nyquist in reverse One should sample at the doubl...   Nov 8 2011, 00:01
- - Wombat   QUOTE (Roseval @ Nov 8 2011, 01:01) One s...   Nov 8 2011, 02:14
- - pappaapa   Question: Shouldn't the rest of the worlds ac...   Nov 8 2011, 15:38
|- - 2Bdecided   QUOTE (pappaapa @ Nov 8 2011, 15:38) To m...   Nov 8 2011, 18:00
||- - pappaapa   QUOTE (2Bdecided @ Nov 8 2011, 18:00) Any...   Nov 9 2011, 00:10
||- - Soap   QUOTE (pappaapa @ Nov 8 2011, 19:10) But ...   Nov 9 2011, 00:48
||- - 2Bdecided   QUOTE (pappaapa @ Nov 9 2011, 00:10) But ...   Nov 16 2011, 13:38
|- - krabapple   QUOTE (pappaapa @ Nov 8 2011, 10:38) Ques...   Nov 8 2011, 18:04
- - Wombat   QUOTE (pappaapa @ Nov 8 2011, 16:38) Ques...   Nov 8 2011, 15:55
- - Wombat   QUOTE (2Bdecided @ Nov 8 2011, 19:00) Far...   Nov 8 2011, 19:31
- - pappaapa   First: Thanks for your replies! And just to t...   Nov 8 2011, 21:20
|- - drewfx   QUOTE (pappaapa @ Nov 8 2011, 15:20) Firs...   Nov 8 2011, 22:42
||- - pappaapa   QUOTE (drewfx @ Nov 8 2011, 22:42) My und...   Nov 8 2011, 23:50
||- - drewfx   QUOTE (pappaapa @ Nov 8 2011, 17:50) QUOT...   Nov 9 2011, 03:58
|- - Soap   QUOTE (pappaapa @ Nov 8 2011, 16:20) So u...   Nov 8 2011, 23:24
- - Roseval   Having digitized some vinyl I know for sure I won’...   Nov 15 2011, 22:49


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