This was already a dubious claim even when every DAC in the world used early 90s Yamaha and Crystal SPDIF receivers. It certainly is BS now with asynchronous USB receivers, SPDIF receivers with much improved PLLs, ASRCs, AES67, DLNA, or any other type of network audio.
So yeah, I'm gonna call that statement uninformed.
I have a 192k file that Mark provided. We are doing some exercises on small clips as an exercise not designing a DAC. Either sample rate is two lines of code, in place and no zero packing with the change of one number. Both of these sample rates factor into very small primes so the FFTW lib has no problem with them.
EDIT I was wrong the code is agnostic to the higher sample rate.
(for a 10sec clip)
fft_in_sig = np.fft.rfft(input_sig)
out_sig = np.fft.irfft(fft_in_sig[0:220501])
(plot result)
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176 is better also. i am lazy typer.... i use 192 almost generically. 176-192 and higher is OK
-RNM
Streaming and down loading of high rez files/music are both very popular over the internet. The internet has been the game changer here and un-hooks us from CD 16/44 only.
-RNM
Sometimes, i think some people just make up things to fit their argument. My original recordings with 1/2 t 30ips and condenser mics was an amazing revelation and got me to appreciate something is very wrong with the process leading to a CD playback sound.... very different sounding compared to master.
D.Wilson (RIP) used the master tape to play and demo how good his speaker can sound. Both at shows and in his home. I first heard his best effort at his home and he used JC's electronics, master tapes. BTW he also used masters of a voice he knew very well... his wifes singing. That way he also learned what the recording has affected,also.
THx-RNMarsh
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Early CD lacquer was slightly hygroscopic, and over time moisture would penetrate to the Al metallize, corroding it...it was colloquially called "CD Rot." Lacquers formulated after 1990 or so in large eliminated this problem. Still, slight scratches through the 10 um lacquer coating which may be hard to see can cause the same problem.
I created a PDF to inform customers about optical disc replication, a link to it can be found here. (The lower-res pix in it are placeholders for very large video files)
Cheers and Happy New Year!
Howie
Just for double-checking the filter response which you have not shown IIRC, only described in words (some dB down at 20kHz etc). I could convolve the 5x20 file with that kernel and have a look at the spectrum and time response, for comparison.
Care to share / point to that library? Quick web search turned up nothing useful (and I didn't expect someone to do this in LTspice which I love but consider suboptimal for this kind of stuff).
It's up to you, personally I don't care too much if we can convince JN of anything or not....
It's fairly easy to see how the theories about the moon landing being faked, alien technology, etc. arise. These processes quite obviously are beyond current human technology. You sheeple can continue to believe that ordinary humans thought all this up. But I know better.
Much thanks, as always,
Chris
Changing frequencies through sampling/reconstruction (given accurate clocks) will take more than an alien technology. It'll be biblical. But we're living in the Final Days, so, who knows? Stuff happens.
Always the best fortune,
Chris
This thread it's about doing comparisons of speakers, although the OP is interested in comparisons to "live" as well. Some problems have been highlighted and my rather complicated idea doesn't seem to help much.
I thought some might find it interesting, any thoughts?..... Richard? Suggestions for a stereo system recording method (binaural, etc)?
Try foobar2000. I don't ever search with it on my PC, but on my phone, the search is lightning fast. I only have maybe 10 GB of songs on my phone but it returns the query results instantly, even faster than Apple Music on iOS, which isn't that slow itself. Google Play Music is glacial in comparison. I guess it depends how crusty your tablet is - I've only tried it on a Google Pixel 2 XL and iPhone XS.
foobar2000 is still old school compared to something like Roon, but if you're using a bash terminal, it's probably an upgrade. If I had a home system that wasn't connected directly to my PC I'd probably do what syn08 does and use DLNA or AirPlay.
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I have some weed or brownie for you, if you would like, I found it adds to the music & scope viewing experience. Booze does not have the same effect. Done enough to know the difference
Back to your bits and bites hour
Are you campaigning against legalization
?
Not to mention all the attention chip builders have given to find solutions by either using an on board crystal like ESS or having anti jitter provisions on chip like AKM.
ESS uses an ASRC to bridge the clock domains, which is why they can use a local oscillator - but your point stands.
I am not aware of anything special AKM is doing beyond the usual variations on techniques to reduce the sensitivity of sigma delta converters to clock jitter (ex. noise shaping and scrambling, switched-capacitor filters).
Still - I agree and it's the most overblown non-issue in digital audio, IMO.
Here you are, all you could possibly need.
Dropbox - LTSpice filter - Simplify your life
Just as a general remark and not meant for you:
Knowing that a signal with massive sidebands will change after having filtered everything above a certain frequency, it's rather naïve to be surprised when seeing that the time domain signal has changed.
Succes with these files, giving a first indication with suboptimal results for this purpose as you mentioned.
I will probably have to invest in Adobe Audition for more accurate results, but first I'll await your findings.
Hans
That is my goto player at work for listening to music and I have installed in on my wife's phone. For local listening it does the job. I accept I have odd use cases for home listening and do not have thousands of dollars of ishiny stuff lying around just to use as a front end. And its a multiuser setup.
Do you have enough experience with this product to know it is safe ?
When trying to install, my protection system warns me this program is unsafe ??
Hans
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