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|  44,1khz vs. 48khz - Can you hear a difference? [MUSIC] | |
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g
  Member
Topics: 10
Replies: 2037
Registered: 03.Jan.03 |
Atlantis wrote on 12 Dec. (15:28) :
Oh oops, I should've used a sawtooth waveform.  Doh! Let me do them again. 
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It will probably be harder to hear on a sawtooth than a sine (if you used a sine, I didn't listen to the example...), because then you have all those other frequencies.
Also, I'm positive I can't tell the difference between the same sound sampled at 48 or 44.1kHz, and I'm equally positive that artifacts will arise when resampling. My advice is to pick one and stick with it, and then focus on the melodies! If you're still worried, add some noise and no one will be able to tell if there is any aliasing or not.
klart slut |
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g
Member
Topics: 10
Replies: 2037
Registered: 03.Jan.03 |
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Atlantis wrote on 12 Dec. (14:59) :
s-f wrote on 11 Dec. (10:50) :
Atlantis wrote on 11 Dec. (8:14) :
I don't understand how averaging a group of 256 consecutive 20-bit samples adds 4 bits to the resolution average. 
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Let's say you have a 4 bit sample, which means it can contain 16 discrete values from 0 and 1, and you want to play it back using a 2 bit D/A. The problem is, the 2 bit D/A only has four discrete values, 0, 1/3, 2/3 and 1. If you want to use overampling to get a higher average bit depth, you have put out your bits faster. Twice the rate won't do, it gives only 7 discrete averages. Three times the rate gives 10 discrete values and four times 13. Five times the rate finally gives us 16 different averages, exactly what we need to reproduce our 4 bit sample. It works the same way with 24 bit samples on 20 bit D/A:s, only the numbers are too many to keep in my head. 
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Now that's a lot of smart stuff.  How does twice the rate give 7 discrete averages, etc.? I kind of see where you're coming from but I don't think I understand it fully.
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Well, let's take a one bit example then, it has two discrete values; one and zero. If take two bits, in a row, you get the combinations: 0+0, 0+1, 1+0 and 1+1. Normally two bits would give four different values, but our D/A only goes to 1. Thus the best we can get is the average values, which are 0, 0.5, 0.5 and 1. Needless to say, 0.5 and 0.5 are the same, so we just have three different vales from our two one-bit numbers. In order to emulate a two bit D/A with a one bit D/A, we have to increase the rate to three times; 0+0+0, 0+0+1, 0+1+0, 0+1+1, 1+0+0, 1+0+1, 1+1+0, 1+1+1. Add up and divide by three and we get the averages: 0, 1/3, 1/3, 2/3, 1/3, 2/3, 2/3 and 1: that's eight averages but only four different values.
I guess in the one bit example it would work a bit like a switching regulator. Just a bit tho.
god jul |
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Slog
 Artist
Topics: 61
Replies: 221
Registered: 14.Jan.03 |
AKiSeY wrote on 21 Apr. (16:37) :
I honestly can't ....
But can the human ear even "hear" such high frequencies? Somebody knows where the limit is? |
I heard that humans can hear up to 20000 hz when they are new born. and when you get over 10 years old you start to fall down and most grown up poeple closing in to 40 years and so normally can hear only up to 14-16khz. but some are even all the way down to only hearing 12khz when they are old. But then again. I dont think this is the same freqeuensies we are talking about here, right?
|Slog| Respect  |
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minomus
Member
Topics: 7
Replies: 251
Registered: 16.Nov.05 |
Slog wrote on 12 Dec. (16:32) :
AKiSeY wrote on 21 Apr. (16:37) :
I honestly can't ....
But can the human ear even "hear" such high frequencies? Somebody knows where the limit is? |
I heard that humans can hear up to 20000 hz when they are new born. and when you get over 10 years old you start to fall down and most grown up poeple closing in to 40 years and so normally can hear only up to 14-16khz. but some are even all the way down to only hearing 12khz when they are old. But then again. I dont think this is the same freqeuensies we are talking about here, right?
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I guess you didn't read the whole topic, just the first post 
http://www.myspace.com/andypiney
Upcoming release: Valve - Farlight (Original & Andy Piney remix) [Neuroscience Recordings] |
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oZostomia
Artist
Topics: 48
Replies: 506
Registered: 23.May.04 |
48khz 24bit gives more warmth into the sound!
"....How can you hear what is right or wrong?...."
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