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[Bit-tech] WireDream claims audio boost with silver SATA cable - Page 8

post #71 of 88
Quote:
Originally Posted by mikeaj View Post

That's not really right either. I'm not familiar with the HDMI physical layer, but even "on-off" signaling at that frequency is not going to look like that because obviously the bandwidth of the system is limited. You won't get the sharp instantaneous transitions like that. It's a useful model for visualization, but if you were to take a high-speed scope to the output, I don't think you'd actually see something like that, even noise aside, which is what I think you're implying.

It doesn't matter what the signal looks like in reality, as long as the destination can reliably tell the difference between on and off.

With analog, any bit of noise or distortion is potentially perceptible at the end, while with digital, if the signal is getting through, that's all that really counts.
Quote:
Originally Posted by mikeaj View Post

Regardless, you can check the eye diagrams of standard HDMI installations and see that indeed the probability that a bit gets flipped is very very very low generally. Also for HDMI I think there's furthermore some forward error correction code applied to the data island period, in which the audio data is sent.
Also, I think a lot of people have some exaggerated conception of the degradation you get with a standard interconnect passing audio frequency signals a few meters (it's quite small). That's not really a good example to bring up to contrast a digital baseband communications system.

All true.
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post #72 of 88
Quote:
Originally Posted by perfectblade View Post

No this is not true, except at extreme lengths.
Unless there is damage the signal should sound the same. This is especially true with digital where it either is or isn't there. All measurements have shown this, as have tests on humans.
I'm surprised to even see this show up on overclock.net since I thought this site was about science...

Actually it's common electrical engineering. The thinner the wire, the higher the resistance. Audio is just electronic pulses and in the case of speakers and the less resistance there is, the better the sound quality will be at the receiving end. That's why a majority of the time, a better, thicker cable will produce a better sound than a cheap, thin cable.
post #73 of 88
Quote:
Originally Posted by Lareson View Post

Actually it's common electrical engineering. The thinner the wire, the higher the resistance. Audio is just electronic pulses and in the case of speakers and the less resistance there is, the better the sound quality will be at the receiving end. That's why a majority of the time, a better, thicker cable will produce a better sound than a cheap, thin cable.

Sure but the cable that comes with whatever headphone or speaker is almost always adequate and typically only fail if there is some damage or flaw. After-market or premium cables are always a scam, as decent cables are perform equally as well.
post #74 of 88

This is a lie...

 

 

SATA sends data, not audio...

 

 

You cannot have higher quality 0's & 1's ...

 

 

 

 

post #75 of 88
Quote:
Originally Posted by formula m View Post

This is a lie...


SATA sends data, not audio...


You cannot have higher quality 0's & 1's ...




We're upgrading to 2's and 3's coolsmiley02.gif
post #76 of 88
Quote:
Originally Posted by hazarada View Post

nope, i had to make a report on a lvds interface just last week (with quite similar physical properties to hdmi) and that is exactly how it looks like on an oscilloscope(well aside from being upside down)

What was the signaling rate of the LVDS interface you were looking at? I'd imagine it would look more like that the lower the bandwidth so the wider the time scale, though not at all an expert in these baseband communications systems. I guess it really depends on your perspective. The line drivers are really fast, but they're not instantaneously fast.

What are the rise and fall times of HDMI really? A quick search said higher than 75 ps, lower than 0.4 * T_bit. If it's anything like 0.1 to 0.4 of T_bit I would think that the straight lines up and down are not really indicative of what's going on. But if it's small relative to to T_bit then you're right of course.


Regardless, generally, however it looks, it's good enough such that it works properly. This is kind of a side topic.
post #77 of 88
Quote:
Audiophiles have long claimed that expensive cables constructed from oxygen-free copper, gold or even more esoteric materials can have a serious impact on sound quality ...

I resent that statement. Real audiophiles know that's completely false.
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post #78 of 88
Quote:
Originally Posted by Lareson View Post

Actually it's common electrical engineering. The thinner the wire, the higher the resistance. Audio is just electronic pulses and in the case of speakers and the less resistance there is, the better the sound quality will be at the receiving end. That's why a majority of the time, a better, thicker cable will produce a better sound than a cheap, thin cable.

This is complete ignorance. Resistance doesn't affect quality, it affects current carrying abilities. That's it.
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post #79 of 88
Quote:
Originally Posted by Cavi Mike View Post

This is complete ignorance. Resistance doesn't affect quality, it affects current carrying abilities. That's it.

Connecting to passive speakers, if the wires have some non-negligible resistance compared to the load, then you're losing some of the signal across the wires so the volume will be a little less. I wouldn't particularly call that a loss of quality by itself though.

More importantly, note that with extra resistance in the wires you're reducing the damping factor, which might make an audible difference other than volume, with a high enough resistance.
http://en.wikipedia.org/wiki/Damping_factor
post #80 of 88
If I had hit the mega millions yesterday, I woulda been all over these just to say I did it.
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