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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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2Bdecided
post Oct 17 2011, 10:07
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@benski,

...but if you're simply relying on the high sample rate to keep processing aliases out of the audible band, you need to go into the MHz for some operations. Or do them in a smarter way. I agree that keeping the base Nyquist limit a little higher when you're resampling through each of many different DSPs can help in an objective and measurable sense: it can mitigate some of the effects of careless processing and/or resampling in each DSP module. This can be audible is the processing is bad enough - e.g. really trashy resampling. But is the improvement enough to turn trash into perfection? No.

C.R.Helmrich's response is right IMO - people do it because they can, and they believe it sounds better. Despite an almost total lack of any corroborating evidence. Plus a few people will pay more for a recording at a higher sample rate, for the same reason.

EDIT Examples:
http://www.soundkeeperrecordings.com/purchase.htm
http://www.paulmccartney.com/bandontherun/gbp.html

I guess the question becomes: why wouldn't you do it? If it costs nothing, and sells one more copy, or lets you charge some people more, or gets you bragging rights in some circles, then it's "worth it" - even if the technical benefit is zero.

Cheers,
David.

This post has been edited by 2Bdecided: Oct 17 2011, 10:11
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benski
post Oct 17 2011, 11:47
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QUOTE (2Bdecided @ Oct 17 2011, 05:07) *
@benski,

...but if you're simply relying on the high sample rate to keep processing aliases out of the audible band, you need to go into the MHz for some operations. Or do them in a smarter way. I agree that keeping the base Nyquist limit a little higher when you're resampling through each of many different DSPs can help in an objective and measurable sense: it can mitigate some of the effects of careless processing and/or resampling in each DSP module. This can be audible is the processing is bad enough - e.g. really trashy resampling. But is the improvement enough to turn trash into perfection? No.
David.


Sure, but for polynomial equations (or polynomial approximations of transcendental functions), the aliasing is predictable. Because multiplying two signals M and N will produce a sideband at M+N, each polynomial order will require an equivalent increase in sampling frequency. Certainly there are other aliasing-reducing techniques such as using an all-pass for fractional delays and minBLEP for waveform generation, but for resonant IIR filters, especially, the higher sample rate can really make a difference (and admittedly most plugins probably upsample/downsample internally)

Note that I'm not at all trying to imply that high sample rate in final, delivered, consumer audio is justified. I'm just pointing out that doing the mixing and production at high sample rate is worthwhile. And if you already have a 192kHz master, why not try to sell it for a few bucks more?
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knutinh
post Oct 17 2011, 18:34
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QUOTE (benski @ Oct 17 2011, 12:47) *
I'm just pointing out that doing the mixing and production at high sample rate is worthwhile.

Sounds to me like a sound engineer wasting bandwidth, storage and money assuming that he is better at analyzing dsp algorithms than the guy designing the dsp algorithm was. If a given algorithms works better at 192kHz than 44.1kHz, why didnt the algorithm designer just do the resampling internally? Or redesign the algorithm so that it worked satisfactory at the lower rate?


Not saying that there could never be a situation where what you are saying makes sense for the well-informed technician, but I get the feeling that we could have better sounding CDs and radio transmissions if sound engineers stopped thinking of sample rates and focused on how to _use_ their EQs and dynamic processors instead.

-k

This post has been edited by knutinh: Oct 17 2011, 18:47
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Dirk95100
post Oct 18 2011, 05:06
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QUOTE (knutinh @ Oct 17 2011, 19:34) *
QUOTE (benski @ Oct 17 2011, 12:47) *
I'm just pointing out that doing the mixing and production at high sample rate is worthwhile.

Sounds to me like a sound engineer wasting bandwidth, storage and money assuming that he is better at analyzing dsp algorithms than the guy designing the dsp algorithm was. If a given algorithms works better at 192kHz than 44.1kHz, why didnt the algorithm designer just do the resampling internally? Or redesign the algorithm so that it worked satisfactory at the lower rate?


This.



Mics that have a high frequency responce, also produce more noise. So total resolution does not increase with just adding frequency responce. Its a thing explained by information theory. You can not have the cake and eat it.
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Posts in this topic
- 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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