P Floding Wrote:
Here is an explanation that, to sum up, explains that there seems to be
no devices that implement USB audio in a jitter-free way:
Like I said, I love my Squeezebox. I'm not so attached, however, that
I'm not curious how the PC-USB--I2S--DAC interface might sound in a
few
bsquare Wrote:
you aren't quite getting it: the usb output from the sb would go to a
usb dac, not to a pc.
bb
With the risk that this has been answered already:
Do really USB sound cards work without a PC with associated software
drivers?
I suggest using a cheap laptop running
seanadams Wrote:
Good point - USB audio is designed for real-time as opposed to reliable
transmission. I.e. great for gaming or normal pc audio needs, but not
hi-fi.
WRT to the rest of the article - nice! An excellent random stream of
consciousness ranging from how to probe a die using a
P Floding Wrote:
OK, thanks for the info!
I wasn't aware of the On-The-Go stuff.
I wasn't either till i searched, so thanks for asking.
Also gotta mention I still think it's easier to use SB for now, as
implementations of USB audio seem questionable at best in this stage of
the game.
P Floding Wrote:
I agree.
And, anyway, if anyone is planning to build a properly designed D/A
that pulls its data from a computer one might as well start with an SB
and modify it.
Don't agree. Otherwise it's an unnecessary intermediary that precludes
upsampling.
P Floding Wrote:
I did
Skunk Wrote:
Don't agree. Otherwise it's an unnecessary intermediary that precludes
upsampling.
Me too. The pitfalls of isynch transfer were but one of the hurdles
overcome by the bb engineers. I'm glad we got to talk about it for a
minute before someone jumped in here, but I'd love
USB jitter thread @ AA
http://db.audioasylum.com/cgi/t.mpl?f=pcaudiom=9640
http://www.diyhifi.org/forums/viewtopic.php?t=432
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dwc
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snarlydwarf Wrote:
What would USB -output- offer?
usb has error detection with correction, so cable quality is mostly
irrelevant, and usb is asynchronous and buffered, so it doesn't
introduce much jitter.
bb
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bsquare
The google results seem more helpful, to me.
http://tinyurl.com/964w8
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Skunk
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seanadams Wrote:
But you still have to go to s/pdif, analogue, or something
eventually think of SB3's network connection as being the
error-detecting/correcting, asynchronous link to the computer, and
SB3's digital/analog output as analogous to the outputs on a USB
converter that you
Skunk Wrote:
The google results seem more helpful, to me.
http://tinyurl.com/964w8
thanks, again, skunk! sadly, aside from the normal misunderstandings
and clarifications of why this is even a good idea, there is not much
there to answer my second question. i'm guessing there isn't
bsquare Wrote:
usb has error detection with correction, so cable quality is mostly
irrelevant, and usb is asynchronous and buffered, so it doesn't
introduce much jitter.
bb
What you said doesn't apply to USB audio.
You might read this post and other by John Swenson on the Audio Asylum
seanadams Wrote:
There is nothing magical about a USB DAC which makes it immune to jitter
or anything else you've mentioned. It has to generate a clock signal to
drive the DAC.
The reality is that these very expensive DACs are using the same $2 USB
audio chips that you'll find in M-Audio
bsquare wrote:
and clarifications of why this is even a good idea, there is not much
there to answer my second question. i'm guessing there isn't general
acceptance yet that usb in some form will displace spdif in high end
audio (and not so high end, i hope).
I don't see this (USB replacing
http://www.planetanalog.com/showArticle.jhtml?articleID=12801995
edit: see pt. 2 near midpage
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Skunk
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Skunk Wrote:
http://www.planetanalog.com/showArticle.jhtml?articleID=12801995
edit: see pt. 2 near midpage
most interesting thing i've read all week.
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bsquare
bsquare's Profile:
I almost threw in the caveat that the article is 4 years old, but I'm
not sure what's changed since then (?)
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Skunk
Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685
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pfarrell Wrote:
bsquare wrote:
and clarifications of why this is even a good idea, there is not
much
there to answer my second question. i'm guessing there isn't
general
acceptance yet that usb in some form will displace spdif in high end
audio (and not so high end, i hope).
I
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