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Confused about computer audio HELP!!!

post #1 of 8
Thread Starter 
Hey guys, I just stepped up my audio game on my computer, and would like to know how to get higher rate than 48khz out of my computer to my receiver. First let me post what I have and in the order it goes,

3930k -->6950 X-fire --> HDMI cable -- >Onkyo PR SC5508 --> XLR inputs --> Sunfire sig amp --> Polk Audio LiSM 707*2, and one center 706c

All I can seem to get is 48k audio max. Is that because I don't have a DAC? The HDMI can't carry higher than that, Apple lossless only goes that high, or do I need a sound card? Any help on this would be appreciated. Thanks in advance.
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post #2 of 8
Quote:
In digital audio the most common sampling rates are 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz and 192 kHz.[5] Lower sampling rates have the benefit of smaller data size and easier storage and transport. Because of the Nyquist-Shannon theorem, sampling rates higher than about 50 kHz to 60 kHz cannot supply more usable information for human listeners.
check this out - http://en.wikipedia.org/wiki/Sampling_rate
Cheers! thumb.gif
EDIT: IF you have a digital audio out (optical or coax) on your board, you should be able to get a better rate, but you won't notice it redface.gif

Edited by ripsaw - 5/18/13 at 7:01pm
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post #3 of 8
As mentioned above, it offers no audible benefit to go for a higher sample rate than that of regular CDs (44.1KHz). It's purely a marketing gimmick, people can't tell the difference between normal sample rates vs. 96KHz or 192KHz. The only benefit of high sample rates is completely irrelevant to music listening, and it's a lower latency when doing real-time audio related jobs like mixing/recording/playing or being a DJ. The sample buffer (usually between hundreds and thousands of samples) gets cleared faster since the DAC processes more of them per second. Other than that, don't bother, and most certainly don't pay for "HD tracks" as the increase in quality doesn't exist. Furthermore, many of them are just upsampled 44.1KHz tracks so there's nothing new in the HD tracks (and even if there was you couldn't hear the difference).
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post #4 of 8
Thread Starter 
Cool thanks for the help guys, So I guess I should leave it at 44.1 then. Well just wanted to ask. I wanted to upgrade my audio and I did. I just wanted to make sure I was using all the right files and settings. Thanks guys.
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post #5 of 8
You should check all the rates that your receiver supports, otherwise your computer will try to resample anything that you don't have checked. For example, playing back a Blu-ray with 192khz sound would be resampled to 44.1khz if that is the only one you had checked. Resampling is bad.
post #6 of 8
Electrocutor has a point. However, the audibility of resampling can be debated, as it varies on the algorithm and devices used.

Now this illustration can be wildly misleading, as even a very wild looking graph might not be audible to your individual ears, but here you go anyway!
http://src.infinitewave.ca/

It is however an interesting "nice to know" factoid that different resampling algorithms aren't completely identical, although maybe it's slightly off-topic when we're talking DACs and audio interfaces. Anyway, I'd rather use the receiver/sound card at 44.1KHz to avoid resampling the CD quality content to 96KHz or 192KHz, which as you said, might be bad biggrin.gif
Edited by seepra - 5/23/13 at 12:20pm
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post #7 of 8
I use 96khz which is the max output my reciever can do. I transfer through optical cable from my Creative X-Fi Titanium Fatal1ty. Sound is almost the same as 44/48khz There IS difference is the source of the audio has a higher quality lice FLAC or FLAC HD. But all is so subtle that its almost subjective.
On the other hand I DO recommend getting a good audio card. Changing from stock soundcard to a creative (which is nothing out of this world, actually) was night and day. Games sounded better, music, beautiful. So its not about khz but audio quality. Also being able to expand to 5.1 channels from an audio file which is 2.0, also is nice. And being able to play games at 5.1 when using optical cable is also cool. But that's just me.

BTW, nice speakers !
post #8 of 8
Quote:
Originally Posted by pokerapar88 View Post

I use 96khz which is the max output my reciever can do. I transfer through optical cable from my Creative X-Fi Titanium Fatal1ty. Sound is almost the same as 44/48khz There IS difference is the source of the audio has a higher quality lice FLAC or FLAC HD. But all is so subtle that its almost subjective.
On the other hand I DO recommend getting a good audio card. Changing from stock soundcard to a creative (which is nothing out of this world, actually) was night and day. Games sounded better, music, beautiful. So its not about khz but audio quality. Also being able to expand to 5.1 channels from an audio file which is 2.0, also is nice. And being able to play games at 5.1 when using optical cable is also cool. But that's just me.
Unless your sound card does some DSP before sending the digital signal to the receiver via optical/coaxial/AES/EBU/HDMI, the signal should be for all intents and purposes identical. Without any pre-processing like X-Fi Crystallizer or equalization, they should be bit-for-bit identical. If a person does the D/A conversion outside of the sound card, I don't see how the sound could change.

There should not be an audible difference between 44.1KHz and allegedly "higher definition" sample rates. If there is, the resampling algorithm is broken or flawed. If you do a 44.1KHz downsampling of a 192/96KHz track in a way that's known to be audibly transparent, I dare to claim that you would not hear a difference, as opposed to letting your sound card, OS or player re-sample it on the fly with worse quality.
Also, Audio Engineering Society disagrees that there is a difference between sample rates higher than 44.1KHz, as long as the resampling is done right. Furthermore, not only did they re-sample the track, they also inserted an additional A/D-D/A loop into the system which SHOULD by all audiophile myths ruin the sound quality, and guess what, it didn't. Unless your experiment was conducted blind, it is debatable whether you heard an actual physical difference in the sound, or have you merely thought there's a difference. It's normal to think there was an improvement so I'm not directly attacking you, I'm saying that some differences that might seem obvious and night-and-day, might in the end be very illusive or nonexistent.
Edited by seepra - 5/23/13 at 12:33pm
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