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sample rate
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fluct
Started Topics :
4
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1
Posted : Feb 22, 2005 07:57
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hi,
im curious as to what sample rate most people are working at, and how much it matters. 44.1, 96, etc.
Because it all ends up at 44.1 for CD anyway, how much does it matter.
96 taxes the computer ALOT more, but I havn't mastered anything on a CD to be able to compare.
thanks
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Triplex
Triplex
Started Topics :
22
Posts :
134
Posted : Feb 22, 2005 10:33
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SpockteR
Started Topics :
0
Posts :
6
Posted : Feb 22, 2005 17:41
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Think of ...
- When changing the frequency, (from 44 to 48 (or 96)) then take care of the volumes, some plugins change the volume-levels.
- some plugins (Absynth 2) do not support 48 kHz
I work at 48, and I render the files at 32Bit. I would like to have 96kHz ... but I wait 2,3 more years, even with a RME and P4 3.2 GhZ 96kHz is unusable (imho), the systems still need to be improved.
 t = (3/(8*G*Pi*rho))^(1/2) where 'rho' is the density of the universe and 't' is its size. |
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UnderTow
Started Topics :
9
Posts :
1448
Posted : Feb 22, 2005 19:50
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I think 48Khz and 96Khz are pointless because anything you gain is lost when converted down to 44.1Khz as each and every sample has to be mangled to fit into 44.1.
If you want to go above 44.1 Khz, go to 88.2 Khz.
Note that that at the Sony labs and Sony studios, they don't convert between 48/96 Khz to 44.1Khz digitaly. They will send the 48/96Khz signal to a D/A converter and then send the analogue signal to an A/D converter clocked at 44.1Khz.
Now if Sony can't do this conversion well digitaly, no one on this forum can.
Personaly I work at 44.1/24 for psytrance.
UnderTow |
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SpockteR
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Posted : Feb 22, 2005 21:09
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Quote:
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Now if Sony can't do this conversion well digitaly, no one on this forum can.
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Uhhh - big fat Sony  - but you might be right, all the digital dithering stuff that progs like Cooledit offer may be inferior to the results of good D/A-A/D-converters.
But that's not the point, and 88.2 is not implemented on every soundcard...
With higher sample rates the plugins work with less calculation errors (rounding), there's simply more "information-space".
This makes your plugins sound clearer, try with Pentagon - your should hear it.
Of course, when going down to 44.1 for the CD you loose quality  , but not as much as "anything you gain is lost".
Anyway, I hope this 44.1 kHz circus will be over&gone soon and we'll have the pleasure to work with DVD-Audio which implements various higher combinations of resolution/sample rates like e.g. 24/96.
Even more:  Look at the future:
"With a Sample Size of 24 bits and a Sample Rate of 192KHz (24/192), DVD-Audio is capable of recording an audio signal with a frequency range of 0 to 96KHz with a dynamic range of 144dB." (source: DVD-Audio specs on http://www.digitalaudioguide.com/faq/dvd-audio/faq_2.htm#What%20are%20the%20DVD-Audio%20Specifications? )
It might be a bit "dreamish"  - but imagine the sound-quality of a party where such productions are played at high volume - this will be killa !
t = (3/(8*G*Pi*rho))^(1/2) where 'rho' is the density of the universe and 't' is its size. |
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Hayez
Started Topics :
8
Posts :
393
Posted : Feb 23, 2005 01:05
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the basic rule says: record at the highest quality possible and do the conversion only when you don't have other choice. don't let the cd quality barriar fool you. keep in mind that not all sample rate convertors are created equal, some of them have alias problems and others can cut some of the high freq response. I'm not suprised that sony prefers another stage of D\A and A\D instead of sample rate conversion, but their A\D probably cost more then a all studio.
that said, I can't expect anyone today to mix 24\96 in his home studio. personally I mix at 24\44 and exporte it to 32\44.
"a new art came into my mind which only you can create, the Art of Noises, the logical consequence of your marvelous innovations." Russolo, 1913 |
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UnderTow
Started Topics :
9
Posts :
1448
Posted : Feb 23, 2005 16:07
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SpockteR: Dithering is used for bit depth conversion, not sample rate conversion.
Hayez: You have a good point about the quality of the AD/DA converters that Sony uses but they should also have very good digital sample rate converters. They could use their DSD technology for instance but they still choose to go the analogue path as they seem to think that it sounds better.
I forgot to mention something in my last post: Although I work at 44.1 Khz when making the music, I do the mastering at 88.2Khz (when done outside of the sequencer).
As for bit depth, these days I tend to "master" within the audio sequencer. So the audio is 24 bit within a 32 bit FP track and gets summed at 64 bit FP in the busses. The "mastering" plugins run at 64 bit with 4x oversampling (176.4 Khz). That should be good enough for psytrance. 
UnderTow
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