Jeg anbefaler videolinken nedenfor også til dagens 12 kaffe. Her får man en fin og nytting gjennomgang av hvorfor lyd ikke bare er frekvensrespons fra 20hz til 20 kHz. Videoen viser noen interessante lyd-eksempler. Kunchur er en regelmessig bidragsyter til anerkjente publikasjoner og er således en talsmann for vitenskapen. Har dette noe relasjon til strømfilter? Neppe, men går man i dybden - så kanskje.
High End Audio and the Domain of Time | Hifisentralen
Jeg legger ved svar fra på denne videoen fra en som heter Steve.
This is a classic case of "pressure to publish" academic papers from Uni's. Anything will do, so long as it makes the Uni look good and grabs attention - they actually keep score of published papers!. In other words it's about money in the end.
The first part of the show explains that a) some instruments sound different to others and b) if you mess with recorded waveforms, they may also sound different. Big surprise!
Then the time delay bit. Yes, many of us did loads of work at Uni studying the time domain versus frequency (and inherently phase) domains. It underpins tons of engineering, yet is not rocket science, so to speak! The time delay tests didn't show anything unexpected to me, and if you listen to tones played through multiple speakers at tiny displacements from each other it alters how you hear those tones. Hmm, I do this all the time instead of dancing to some loud dub. Also, when I pluck my guitar's strings, I haven't yet found a way to delay one or more frequency components in order to prove something about the importance of specific tone delays, but I'm sure there is a pedal I can buy that does this.
Another 'surprising thing' being that real, live instruments don't sound the same when recorded. This is what I expect, but the issue is really to create an pleasurable impression of reality. And in my case, 99% of what I listen to comes from electronically amplified kit, and recording that does to me, often sound very much like it does live. I concede that if I played a cello in my front room it would sound better than a recording, but that would apply no matter what you spent on kit. I watch films and enjoy them. Some films are nice in 4K, but when I'm watching a film, I don't sit there and say "Y'know what? the actual outside world looks more accurately rendered than this film does!" - that would lead to divorce.
Then we have a load of interesting stuff about ears, nerves and brains. In my case, all of these items are used for listening, whether the sound comes from live instruments, or recordings - it's not clear clear to me what was being explained here to support expensive kit.
The thing about hearing high frequencies and whether it's relevant in "spec wars" for HiFi kit was old news.
I could dissect further, but I'm happy with my £3K system, as opposed to a £30K or £300K system, but if
blind testing means an individual can always accurately identify that they get more listening pleasure with expensive kit, go right ahead and buy it! It's nevertheless interesting to try to quantify why this works.
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