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Is it really useless Upscaling 16/44.1 music to 24

Is it really useless Upscaling 16/44.1 music to 24/176.4 or 24/192
In the past I asked this question and from the answers I learned that converting any music from 16/44.1 to higher resolution is just adding bunch of zeros in front. But now I started seeing so many DAC’s up-sampling the music to 24/192 or 24/384, which bring up the question again “Is it really add zero in front of 16/44 or did they figure out how to create a broader spectrum in frequency from 44 khz to 384 khz and how many listeners heard the difference in quality of sound by up converting it? “We are not discussing the HD-Track’s music.”
I read the reviews and saw the picture open DACs. I don’t see much in them other than a high rez sound card. Please correct me if I am wrong.
And finally, In JRiver/Foobar we have an option to up sample the music. Questions are
1) Does up converting makes a difference?
2) What is the difference between $500 or $5000 DAC re-sampling the music verses Foobar or JRiver re-sampling?
3) Can JRiver/Foobar do the same job in re-sampling the music as a DAC does?
trcns
cerrot's avatar
cerrot
1,606 posts
 
Lewinskih01 - I do mean noise and my puter is very quiet as well. Its also plugged into a power conditioner and APS and sits on a 4 inch maple shade base with the brass points and an isolation brick on top - and I would never let the nasty bugger in my sound room necause of all the emf and other nasties is gives off (not just noise you can hear but noise you cant as well). I have a bathroom right behind my sound room on the other side of a wall - I may drill throyg and put the server in that bathroom (I guess like Hillary) to get it closer and get away from the 10 meter cable but it does suound awesome.
kijanki's avatar
kijanki
3,575 posts
 
Lewinskih01, There is no such thing as "Linear Power Supply". All power supplies are switchers and so called linear one is pretty bad one switching at 120Hz - frequency very difficult to filter out. Switching happens at the peak of the voltage while current is taken from the mains in short spikes of very high amplitude (polluting). For these reasons Rowland amplifiers use high frequency (1MHz) SMPS switching at zero voltage/ zero current even in his class AB amps. SMPS get their bad name from crude computers applications.
steakster
720 posts
 
Kijanki, Could you please elaborate in layman's terms? Re:
No such thing as "Linear Power Supplies"
Your earlier explanation flew way over my head. For my laptop, I recently swapped out the OEM AC/DC power supply/converter for a transformer-based AC/DC power supply/converter. It's delivering 19vdc exactly as per the laptop specs. In my main rig with Tidal.com, the results seem to display better extension in HF & LF. So, where does the switching power supply enter the picture? Is a transformer-based power supply not linear? Thx.
kijanki's avatar
kijanki
3,575 posts
 
Steakster, Linear power supplies pollute more then well executed switching power supplies, that got bad reputation from crude computer applications. Well executed SMPS is extremely quiet and that's why Jeff Rowland uses them now in all amplifiers (also class AB), not to mention preamps (like Capri) where, because of low power, efficiency is not a factor. I'm not sure where "linear" came from, but probably refers to linear output vs. input voltage change - meaning unregulated. You can add linear regulator, but only for small loads like CD, preamp, etc - not for the power amp. They require huge capacitors to keep voltage ripple down. Transformers are huge as well. The reason you had better results with linear supply was the fact that your computer switcher wasn't designed for audio application.
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