Newman
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They claim flat to 40 kHz!
The widely used Vifa ring radiators have been doing that for..... over ten years?
They claim flat to 40 kHz!
Oooh… nostalgiaThis brochure for the Sony PCM-1610
If I remember rightly, the simple lack of a colour sub-carrier within the incoming signal 'told' the recorder that it was monochrome, at which the machine was supposed to switch off any of its colour processing circuits that could degrade the signal.…actually used slightly modified recorders - ones that disabled the chroma signal, so they were B/W recorders anyway
Hugely fascinating. Nowadays, we can make a (PCM) copy of an analogue recording that includes any and all artefacts up to a few hundred kHz, which probably safely covers any bias-related phenomena. But once you need to put an analogue copy of a tape into the evidential pot, I reckon a good lawyer can sufficiently stir that pot so as to render its evidential value minimalIt's playback that is compromised because of handling and ferrous residue so a high quality copy is made first.
On response above 20 kHz, I am testing this Barefoot speaker and while I didn't go up that high, the company did:
They claim flat to 40 kHz!
In any way,,,
My huge digital music library and many playlists consist of a mixture of 44.1 kHz AIFF tracks ripped from CDs and HiRes tracks/albums download-purchased, many of which have the HF noises in 25 kHz to 176.4 kHz. It is not good mentally, psychologically or electronically, and maybe not good also for my ears and brain.
I really don't like these HF noises getting into my DAC8 PRO, amplifiers and SP drivers.
I am seriously testing, therefore, high-cut (low-pass) digital filters before the digital signal enters the DAC8PRO, as shared here to here. This is my self-defense measure as an end-user audiophile and music lover.
Alternatively, if necessary and feasible, you can directly "edit" the HiRes music file to erase the HF noises as shared here to here. If you do not have too many "insufficiently/improperly engineered" HiRes tracks/albums, this is another (ultimate?) self-defense measure.
Have you seen what many tweeters are doing at 20 - 30kHz? There nay not be music up there, but noise spikes may well upset these tweeters taking off.I'm not following why any 25khz and up noise would bother you. I think I may just be dense today or old age is hitting me. I'm assuming it is 25khz sound you are saying bothers you but how do you hear it? Thanks for the info. Maybe I just need more coffee today......
I have extended the bandwidth for some of my tests because members want to know if there is a brickwall filter in active speakers and such. Also, the extended response allows more harmonic distortion products to be shown.I don't see any reason at all to test speakers over 20khz. It seems to me to be heading down the road of pseudo science. But, that is only my personal opinion. If someone can't hear above 18khz (probably 90% of the adult population) then why test to 25khz? I might need it explained to me as I can be wrong every other year when it rains in May. I just try to keep my mistakes to a minimum!
Indeed, metal tweeters especially don't like this.Have you seen what many tweeters are doing at 20 - 30kHz? There nay not be music up there, but noise spikes may well upset these tweeters taking off.
I'm not following why any 25khz and up noise would bother you. I think I may just be dense today or old age is hitting me. I'm assuming it is 25khz sound you are saying bothers you but how do you hear it? Thanks for the info. Maybe I just need more coffee today......
Nocebo effect? https://en.wikipedia.org/wiki/Nocebo
Yep, that's the exact tweeter in them - a Vifa XT25.The widely used Vifa ring radiators have been doing that for..... over ten years?
While I hate to rain on your parade, were that true the insertion of a low pass filter at, say, 22kHz in such material would cause an audible change. If the existence of content that high in the spectrum is of any audible consequence, it is just as likely to be the result of intermodulation products*. Not beneficial.when the "music sound" in such high Fq is mixed with high quality music sound of 10 - 20 kHz, the 22 - 50 kHz sound may have unproved audible preferable effect
If you have enough relaxed time, you would please first see all of the four amirm's YouTube clips in his threads;
https://www.audiosciencereview.com/...-high-res-music-antonio-forcione-video.23083/
https://www.audiosciencereview.com/...-live-from-minster-from-the-lake-poets.23095/
https://www.audiosciencereview.com/...pcm-vs-mqa-vs-cd-2l-sampler-comparison.23172/
https://www.audiosciencereview.com/...son-linn-records-free-high-res-samples.23366/
Then, you would please read carefully my posts here to here.
The issue has been also discussed around 2015 in Japan, like in this page even though in Japanese;
https://sandalaudio.blogspot.com/2015/09/blog-post_17.html
I hope your web browser would properly translate it into English.
Where, "Niserezo (偽レゾ、ニセレゾ)" means "sham HiRes".
The article is really nice and delivers almost the same messages as amirm just gave to us.
Yes, a kind of...
I believe, however, this is a serious disappointing "quality control" issue in HiRes industry and business. And Amirm pointed in his YouTube clips that "it could trigger oscillation or amplifier problems such as intermodulation , aliasing down, using up headroom, possibly even baking a tweeter voice coil...", even we cannot hear the sound over 20 kHz.
At least for me, I would like to have my self-defense measures, as shared in my above post #204.