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[techpowerup] Biostar Hi-Fi A85W 3D 'Audiophile' AMD FM2 Motherboard - Page 4

post #31 of 35
Quote:
Originally Posted by Monstrous View Post

If it doesn't do the representation bit-perfect, then it's broken. Arguing otherwise means that all digital cables would occasionally just do random stuff, and text files transferred over USB contained incorrect letters and completely random symbols. Which you know they don't.

The reason you don't understand it, is because you call it a myth. Audio signals are SO easy to digitally transmit, that the controllers work at what is basically a 100% correct transmission rate.

For what we're talking about, the 100% or 0% is correct. Even if it wasn't, the difference would be so absolutely minuscule that it would in no way be audible.

Here's an example.

A CD player that has been lying in a bin which functions properly from 1992.

A DCS Puccini SACD transport - brand new.

Both of these, put through the same DAC will sound exactly the same. I can guarantee you that, because I've both witnessed and seen it measured.

Until you get a CD player (or any other audio device for that matter) that doesn't actually output a bit perfect signal. You know, like the vast majority of cheaply made ones.

Unless you're going to go out and say 80% of brand new electronics are "broken", your statement is entirely invalid.

If you are going to say that, you may need to take another look at your definition of "broken".
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post #32 of 35
do these things have any use if you're using Optical TOSLINK cable to connect directly to receiver which drives the speakers?
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post #33 of 35
For serious, the cable and optical assemblies have nothing to do with the sound of optical transmission systems.

If anything what you are experiencing is a system using an inferior DAC on the optical input. Or maybe not filtering the optical DAC's output with distorting filters that ruin the sound anyhow (which may be present in the USB decoding hardware/software stack).

I wonder which of you guys would buy a gold or platinum plated optical cable, especially if it was at Best Buy. kookoo.gif
 
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post #34 of 35
Quote:
Originally Posted by Monstrous View Post

It doesn't sound as good because you didn't set it up properly. A device which doesn't correctly transmit a digital signal is broken. They CANNOT sound different, please understand that.

I do believe digital audio connections have error correction in the event of some bits going bad, just like Ethernet.

I recall peeling open a suspicious "copper" audio wire. It had thin aluminum wiring with copper painting. How cute. Not that I notice an audio difference though, other than the occasional audio drops.

Buyers are usually better off in investing in good speakers and at least an acceptable sound card/chip. Then they can scale up. But there's absolutely no reason in lighting +$20 on fire for an audio cable unless if it's a really long one.


EDIT: I also recall that a buggy sound driver or using Window's generic one can wreak sound quality. For my laptop, I had to install a main driver (Realtek) and an "sound-improver" driver (SRS Premium) in accordance of the manufacturer's recommendation.

Installing only the main driver had a noticeable negative effect even on my laptop's speakers, and the audio won't work if the "sound-improver" driver is only installed.
Edited by A Bad Day - 7/3/13 at 11:24pm
post #35 of 35
Quote:
Originally Posted by Diablosbud View Post

Optical is also a great method of audio output from a PC, it reduces latency a lot compared to USB.
proof.gif With a buffer of 256 samples and a samplerate of 192KHz you get a latency of 1.33ms through USB, in addition of some software/OS interfacing latency of course. Anything under 20ms is good enough for anything but most critical studio work, so emphasizing the significance or even noting latency in consumer systems is stupid. You cannot generalize jitter to be solely I/O method dependent. There are USB systems with near-zero and completely inaudible jitter, and equally good TOSLINK, AES/EBU etc. systems, and bad implementations of all of them exist. USB in itself has inherently no more jitter than any other form of flinging bits around, and even if it did, you need to take the cross-scientific approach and remember that if it's inaudible, the difference doesn't matter. There are excellent USB sound cards that measure near perfectly, and here is one measured example in a budget consumer DAC, that -heaven forbid- uses USB! http://kenrockwell.com/audio/cambridge/dacmagic-plus.htm#jitter

Now can we stop flinging misinformed audiophile myths about hardware?
Edited by seepra - 7/4/13 at 12:13am
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