castleofargh
Sound Science Forum Moderator
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when your cat goes from fur ball to Freddy Krueger for no apparent reason, now you know that it's because your music was low passed too soon.I have a cat
when your cat goes from fur ball to Freddy Krueger for no apparent reason, now you know that it's because your music was low passed too soon.I have a cat
-That, I think, is an overly simplistic view.
I think the requirement of "continuous time signals" in Nyquist sampling theory is misunderstood by advocates of high-res / analog audio.
It doesn't mean something like sine waves that started in the distant past and will continue forever. It means continuity in mathematical respect, that a function doesn't "jump" from one value to another in no time. That doesn't happen in real world. Instruments can produce only "continuous time signals". Acoustic waves can be only "continuous time signals". So, the only thing to worry about in digital audio is bandlimiting. If we do that correctly, everything will be fine. Worrying about impulses (mathematical constructions which can't exist in reality) is absurd.
but then I read stuff like this: and I angrily raise my fist in front of my screen with about the same impact on you that high-res tends to have on my ears. I purchase music for the sound I perceive, not to look at a spectrum in owe. so when I fail to perceive a difference(consistently over several years), the 96k file is worth to me exactly the same, not 5$ more. on the other hand if every 3 albums the 44 or 48k version saves me enough to buy a 4th one. now that's audible evidence right there, and it will pass all blind tests.
I don't disagree with you at all......
I have no complaints at all that 44.1k was chosen as the sample rate for CDs in the 1970's (and horses were a remarkably effective and efficient form of transportation in 1820).
However, as you point out, we now live in an age where there are lots of other alternatives, many of which are better.
The fact that CDs were an excellent compromise in the 1970's doesn't mean that we should stop trying to find something better.
One obvious example is oversampling.
It's impossible to design a practical, cheap, and effective reconstruction filter to operate directly with digital audio sampled at 44.1k.
Therefore, oversampling was invented as a way to sidestep this problem.
However, with modern technology, it would be much simpler to just use a higher sample rate.
Taking a 44.1k input and upsampling it to 192k is still somewhat complicated - and the process itself offers many choices and compromises.
It would be much simpler to distribute audio recorded at a 192k sample rate...
And then convert it using a simpler DAC which didn't need oversampling to deliver good performance.
In short, the reasons that were "compelling" for choosing 44.1k in 1978 are simply no longer true.
44.1k is currently being used as the sample rate of choice simply because "it's what our grandfathers used"... like horses... and gasoline powered cars.
(And that argument is becoming less compelling every year, as less and less music is played from CDs.
After all, unlike plastic discs, there's no particular benefit to standardize digital audio files at a single sample rate at all.)
I find it humorous how so many people seem convinced that "modern music producers" are "all trying to rip us off by foisting yet another audio format on us".
(I seem to recall people saying pretty much the same thing about CDs in the 1970's.)
None of my bandlimited CDs play more than about 80 minutes making them time-limited. How is this possible? It's possible because we live in a "noisy" reality where some aspects of mathematical theories become irrelevant. Maybe the CD I played 10 years ago is still ringing in the universe at level -70000073284780000282370000230 dB, but that's irrelevant even at atomic level and the damn CD stopped playing in my ears 10 years ago.Bandlimited signals cannot be time-limited, and we don't capture any infinitely-long signals, so we're never truly bandlimited. "Correctly" thus means "with aliasing that is inaudible", which I think arguably we can attain.
If the nominal end-product of mastering is a 24/96k file, then it should cost precisely $0 extra for said file, and said file shouldn't cost more than the CD mastering of said file because why should less work cost more money?
There's no advantage to having superaudible frequencies in your music. There are only disadvantages. See the link CD AUDIO IS ALL YOU NEED in my sig file.
You will also need a bigger data plan and a ditto hard drive. (Though at today's prices, the latter isn't of much concern even if 32/768 or DSD-4096 is your poison of choice...)
Which DAC do you use?
You charge as much as you can to maximaze your profit. People are willing to pay more for bigger numbers because they are ignorant about the non-existing benefits of high-res audio and that's why they are charged more.
-You are preaching to the choir. (See the 2nd paragraph of my post, quoted below.)
My (poor, as it were) attempt at snark was simply to suggest that there were other possible side effects to hi-res than the discomfort of pets - like increased download and storage costs...
Just buy 24/96 downloads then if CD feels grandfather audio to you. Why 192 kHz? That's comical overkill just to distribute 20 kHz audio band when 60 kHz sampling rate would already allow relaxed reconstruction filters. 16/44.1 reached a level of transparency beyond which there's hardly anything to gain so why bother?
None of my bandlimited CDs play more than about 80 minutes making them time-limited. How is this possible? It's possible because we live in a "noisy" reality where some aspects of mathematical theories become irrelevant. Maybe the CD I played 10 years ago is still ringing in the universe at level -70000073284780000282370000230 dB, but that's irrelevant even at atomic level and the damn CD stopped playing in my ears 10 years ago.