Fairy nuff, but not clear on where the sound card comes into it if using USB? Are there sound cards now with USB out? Like I said, I'm not clear on any of that :)
Also for clarification, what I'm using is an entirely external DAC. PC - USB - DAC, then RCA cables to the amplifier.
Not so, a good sound card or USB device provides it's own isolation. The proof is in the measurements.
Trevor.
news: snipped-for-privacy@4ax.com...
Some simply use the name "soundcard" for internal, or external ADC-DAC audio devices.
Plenty of USB (and firewire) in/out sound devices available. Have been for very *many* years!
Most devices are simply ADC and DAC in one box, otherwise exactly the same as what you are using, *except* far better quality that what Clocky obviously has!
Trevor.
The 99.99% figure wasn't qualified by any age group etc. Check the many studies of Presbycusis and you will see a consensus that high frequency age related hearing loss is unavoidable.
Everyone's high frequency hearing deteriorates as they age. There are several reasons including damage from high environmental sound levels (industrial deafness etc.) and simply wearing out of the ear's hair cells.
High frequency age-related hearing loss happens whatever speakers you have. Put it this way - when you were a teenager you probably could hear the high frequencies easily. As you age, the only way to get the same perceived sound is to compensate for the high frequency loss - i.e. use a graphic equaliser etc.. Otherwise the enormous difference in sensitivity from the low frequencies to the high frequencies cannot possibly lead to the same perceived sound. Some older people fool themselves into thinking they hear just as well as when they were young, but that is explained by the slow deterioration in hearing that ocurrs and the inability of people to make comparisons over several years of gradual high frequency hearing loss. And just cranking up the overall volume won't correct the relative frequency response - if your hearing is down over 50dB at 15kHz, you'll have to boost those high frequencies by 50dB to hear it like a teenager does.
Correct. That isolation can be provided by complete DC isolation (DC-DC converters, opto-isolated logic, etc), but normally it's just a current transformer in the USB cable. Yes, Virginia, contrary to what some scoffers here say, a better USB cable can make a big difference, by providing better isolation of the ground noise.
Yup.
Quality has nothing to do with it for the most part.
you'll have to boost those high frequencies
Given the crappy sounds I heard when I was a teenager, that is something to be glad for. I can still hear the parts of an orchestra just as well.
Must be...
Nope, any good device provides it's own isolation. The proof is in the measurements.
Trevor.
Er what are you on about, the whole argument WAS about quality! Your device is obviously noisy (low quality) and you *mistakenly* claimed all USB devices are. Something easily proven incorrect by simple measurement of any
*good* (high quality) device.Trevor.
You make the assumption that my devices are low quality, they're not.
Yet it has ground isolation noise that is audible to me.
Maybe you just can't hear it.
The proof is in what people can hear, and it seems ground isolation is still an issue for a lot of people who aren't using junk equipment.
IF they have noise problems as you say, then they *ARE* low quality, simple as that!!!
Then it *IS* low quality, simple as that, since many others don't !!!
Right, no way I (or you) can hear -118dB that *my* USB audio device does, as it's measurement proves. Even at 16/44 it is equal to the CD spec, and FAR exceeds any commercial music CD! You obviously have no idea how to make any measurements, or what they mean, so keep pretending your obviously crappy device is as good as it gets. I suggest you actually try a decent device for your own listening pleasure, and so we can end this pointless argument!
Trevor.
You obviously are an ignorant luddite if you don't know current measurement capability FAR exceeds what ANY human can ever hope to hear!
By definition any digital equipment so poor that ANY person can hear problems with it these days, *IS* "junk equipment", plain and simple!!!!!!
Trevor.
To an extent, I'm inclined to the view that people who are that gullible deserve to be parted from their money.
What I'm puzzled about is how people that gullible get to have that kind of money in the first place. There are only so many who inherit it or win it. I'd have thought that those capable of earning it wouldn't be taken in so easily.
Then again, maybe I'm overestimating how bright one has to be to get rich.
Sylvia.
You sure are. Many rich people have a very limited field of expertise, and most are simply lucky to be in the right place at the right time with the right friends, and little regard for anyone else. And once you can afford to buy politicians, making more is easy. Once you have $Billions, actually spending it becomes difficult, so wasting time evaluating a measly $3k purchase is not worth the effort for them. And whoever coined the phrase "you can't con a con-man" was completely wrong. The greedy are the easiest to con.
Trevor.
"Sylvia Else"
** Lots of wealthy hi-fi cranks living in the USA.They all believe in the myth that if it costs more it MUST be better.
So they must have it.
.... Phil
Yep, exactly.
There was the case (I don't know details now) of a guy who designed a carbon fibre golf-club. He was having difficulty making sales - until he put the price up. Apparently the initial price was too low, and people thought they'd be getting rubbish.
Sylvia.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.