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Go Back   Head-Fi: Covering Headphones, Earphones and Portable Audio > Equipment Forums > Computer Audio

Computer Audio Discussion of computers as source components, sound cards, USB DACs, media servers, etc.

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Old 12-23-2006, 03:09 AM   #11 (permalink)
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Originally Posted by Jahn View Post
can a squeezebox play DVD-A if i'm using Power DVD Deluxe, which has 48/96 capability? and will it play normal computer sounds not coming from the slim software, such as an embedded youtube video or a warcraft game?
no, i guess you can not do that. you can only playback audio files in your computer using squeezebox its own media player. IMO, Squeezebox is a media player, but not a soundcard.
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Old 12-23-2006, 04:36 PM   #12 (permalink)
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Originally Posted by mkozlows View Post
It's your opinion, and it's factually wrong. Leaving the volume at max outputs the exact same bitstream -- 100% identical -- as disabling digital volume control.
Whatever dude. You must have a lot of time on your hands.

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Old 12-23-2006, 06:16 PM   #13 (permalink)
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It is bit perfect and its bit perfect up to -30dB attenuation for 16/44 material.
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Old 12-29-2006, 12:27 AM   #14 (permalink)
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Originally Posted by Solude View Post
It is bit perfect and its bit perfect up to -30dB attenuation for 16/44 material.
Could you please give us some more information on this?

If the volume is changed before the signal is converted to analog then it must be done by messing with the 1's and 0's... and so it wouldn't be bit-perfect anymore...

am I missing something??
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Old 12-29-2006, 01:15 AM   #15 (permalink)
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Originally Posted by NeoVibe View Post
Could you please give us some more information on this?

If the volume is changed before the signal is converted to analog then it must be done by messing with the 1's and 0's... and so it wouldn't be bit-perfect anymore...

am I missing something??
If the output is 24 bit, and the music is only 16 bit, then there's 8 extra bits to play with. You can still preserve the original 16 bits and just sort of move them further back (put some zeros in front).
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Old 12-29-2006, 01:26 AM   #16 (permalink)
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but Solude was talking about 16bit, 44.1kHz material...

or do you mean that the output would be 24bit but the original data would still be preserved, even if the DAC is receiving a 24bit signal? (something like 16bit+volume information :s )
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Old 12-29-2006, 05:04 AM   #17 (permalink)
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This has been discussed at great length on this thread in the slim devices forum with the CEO / designer of the SB trying to educate people on the finer points of SNR and preserving information. It is probably worth your time to read as he does a good job of clearing up some of the common misconceptions.

I particularly liked his "This is completely, 100% wrong. It doesn't matter how many people say this, it is still wrong." quote.
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Old 12-29-2006, 08:54 AM   #18 (permalink)
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From that thread, I think this pretty much sums it up:
There are two different issues here, and I think they might be causing some confusion. One is whether information is lost when you lower the volume; in other words, is it possible to reconstitute the original signal from the signal with lowered volume? The answer to this in the case of the SB (and probably TP) is that there is a certain range from 100 down for which this is possible, but that below some setting it isn't any longer (I think this is 35dB, so to lowest setting is 30 on the 100 point scale).
But of course this is not a question of much practical interest.

Another question is signal/noise ratio of the signal going to a DAC. In that case the issue above is probably tototally unimportant, and the only issue is how much of the dynamic range of the DAC is being used. Any digital signal with lower than max volume will suffer reduced S/N, and it shouldn't matter much, if at all, if it is slightly below 30 or slightly above 30.
So yes, if you attenuate digitally up to a certain point, it's still bit-perfect, you preserve all the information. However, the analog result coming out of the DAC won't be the same because the output has a certain SNR and decreasing the amount of signal coming out makes that ratio worse.
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Old 12-29-2006, 04:14 PM   #19 (permalink)
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Originally Posted by nelamvr6 View Post
Whatever dude. You must have a lot of time on your hands.

Merry Christmas.

So knowing stuff means you have too much time on your hands? How about an 'I stand corrected' and move on instead of attempting to insult someone who is answering the OPs question.
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Old 12-29-2006, 06:07 PM   #20 (permalink)
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Originally Posted by Coltrane View Post
So knowing stuff means you have too much time on your hands? How about an 'I stand corrected' and move on instead of attempting to insult someone who is answering the OPs question.

You and I have different opinions. It is not a matter of one being incorrect.

I still believe that my opinion is correct and your's is not, but I'm not dumb enough to believe that my opinion is the be all and end all.

I stated an opinion, you stated your's as if it was a matter of fact. It is not.

I don't need to state that I stand corrected, I was correct from the beginning, according to my way of viewing things. I won't try to elicit an 'I stand corrected" from you for a simple difference of opinion.

You do things your way, I will do things mine. A feature or option is not disabled if it can still be adjusted inadvertently in my opinion.

Happy New Year.
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