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Actually… it’s wrong. It fails to consider the temporal domain, and that at frequencies closer to Nyquist it’s possible for many people to hear about 1/5th of the details that whatever sampling rate provides. That is to say there’s still about 5 times more detail that gets lost in comparison, at the extreme high frequency. I can dig up the tests again if anyone is interested, but I’m pretty sure Leif has seen them too.
The thing is, it’s a very minute difference and they had to create a specially designed headphone amp and custom modify top-end Grado headphones to make the test possible. And also it should be noted that 192kHz sampling rate is very close to the maximum capability of the ear to discern differences in the temporal domain.
That being said, when applied to FM you have two phenomena.
-1- there’s the L-R signal which is multiplied upwards so this temporal inaccuracy will be more prevalent than it would normally be with a broadband stereo signal of the same frequency response.
-2- 99.999% of receivers alone would throw any perception of temporal loss right out the window because they themselves are not high quality enough for it to make a difference, and this says nothing of the audio amps, speakers, headphones, etc… that most people use which are equally or even more crappy.
As Leif pointed out, bad filters in your ADC/DAC are of MUCH more concern, and I agree 100%. Filters are by far the #1 reason that crappy DACs sound like crap these days. Be concerned about two things… noise and signal transparency. You can’t go wrong when you have very low noise, and near perfectly reproduced signals. There’s no concern at all to be had with 192kHz PCM and for all intensive purposes you will have a near perfect reproduction of anything that’s input or output.
Whoa, that’s heavy stuff man 🙂.
I’ve heard many audiophile grade explanations.. This one isn’t the worst by far, but that doesn’t make it true, and it just muddies the waters.
The temporal resolution you mention, is phase, and can be accurately reproduced as long as you’re far enough away for nyquist for the reconstruction filter to deal with it. Far enough usually means ~10% (20 kHz out of 22.050 kHz).
Any "detail" with higher frequencies further than that, would actually be *out of band* material. If that "detail" was in at the original signal before sampling, and somehow got through the input filtering in the ADC, it would be folded down into the audible band as aliasing (yikes). If that "detail" or out-of-band crap is present at the output but not at the input, then the DAC is faulty.
If by poor temporal resolution you meen poor phase response (think phase tornado) then yes, this is possible for a DAC, although I have never seen it is a 192k capable dac. Also, this problem would be dead easy to spot, as any tiny little modification to a peak-controlled signal (such as the one coming out of Breakaway Broadcast) would cause overshoots from the harmonics (some of which resulting from clipping) to no longer line up with the fundamentals, and thus no longer do their job of keeping the peak frequencies down.
In conclusion, to check if your sound card is good enough, check the peak control on the output with a scope, after having done Tilt and EQ correction. Turn off the Pilot and look at MPX, so that you see the edge of the signal more clearly. Is the peak control perfect, revealing a sharp signal edge? Congratulations! Your audio card is good enough for these purposes and will yield excellent fidelity.
Let’s try to stick to science, and keep the smoke and mirrors to a minimum.
Best,
///LeifWill a motherboard from a different computer work with another computers wires? Ok, i want to get a dimension 8400 motherboard (because there more popular and cheaper) for my dell dimension 8300 case and wires. I want to know if the 8300s wires will make the 8400 motherboard work. Please help.
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