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 71 
 on: March 20, 2015, 11:56:24 am 
Started by brunok - Last post by PeterSt
Hey Hans,

What it comes down to, in my opinion, is how any normal 16/44.1 RBCD can be transferred to a format which does the same as you described for the filtering, but now thus with the multi millions of CDs available and the thousands we like. So to me this is the only useful approach, with the knowledge that any available Hires that did not fail for any of the many reasons can be counted on two hands only and that amongst those there's maybe one I like.
Do notice that "failing" as such, for me already starts at *any* modern remaster, and all the so called Hires is amongst that to begin with. So people behind desks molesting things.
Thus : any remastered CD (just 16/44.1) already sounds way poor compared to its original counter part.
Maybe my standard is too high.

What I feel is that DSD in the end is the better format, BUT when used as upsampled means of 16/44.1 and when done right. So indeed, nothing like "only when DSD remains unmolested right from the recording" it is right. It doesn't exist anyway (when analog mixing was used Yes, but what to say ...).

So just for your information, our D/A converter is 24/768 input-capable for this filtering reason (choose any filtering means you like in-PC). Still this is not enough in my view, which is why I meantioned the 24/11.28 MHz PCM input in near future (PCM x256).
That this is also DSD x256 capable is another matter, but crucial for apples and apples comparison; now all goes through the exact same electrical means and speed and current draw etc.

What I'm also saying and "claiming" thus far (I mean, as long as the real physical thing is not operational yet) is that DSD will be the better format than PCM, when upsampled/filtered from 16/44.1. But I also said (above) "when done right". The difference ?
No noise shaping into the HF regions, no matter many will say it is harmless. So DSD as we are used to, but now without all the HF noise.

I am not saying that this will thus be better than MQA, because there's nothing to compare anyway. I mean, all what MQA will do (if all is right) is providing a lower bandwidth requiring means for Hires PCM. Remember, that Hires which does not exist in the first place.

So what this world should head for is how Redbook CD can be improved upon. At least I feel that this my job here and I think that togehther with all the helping ears (community) we do very well (in the 8-9 years spent on that by now).
Maybe this is also how I mentioned in between a few lines that most have no clue and that especially no 21 years of review etc. experience is going to help much. It is about last week's changes, and yesterday's and what pops up tomorrow. Seriously. Also, the improvements get faster and faster because we get closer and closer to the real (instrument etc.) thing and it gets more and more easy to hear the differences in objective fashion;
All we need to do is compare with the real thing, which is not much subjective ...

Hopefully this sheds a better light on my, say, bashing on MQA; it is just not the we to go forward. In my view of course, but there's some strategy behind that view.

Thank you again,
Peter

 72 
 on: March 20, 2015, 10:54:08 am 
Started by brunok - Last post by Hans_Beekhuyzen
Hi peter,

Excuses accepted. Good of you to respond this way. You must know my track record; I rather had my magazines go broke than sell my soul to the devil. It was therefore that I needed to respond. But enough about that.

The difference between PCM and DSD? The jury is still out. DSD is extremely difficult to use in production, almost always post production is done in PCM at 352,8 kHz/32 bit. The main advantage is that DSD64 has equal resolution to PCM at 352.8 kHz sampling at 32 bit depth while having a bitrate equal to 192 kHz at 24 bit depth. Another advantage is that - even when doing post in PCM - the anti aliasing and reconstruction filters cause less time smearing since they only have to filter at very high frequencies. The nice thing about MQA is that, while filtering at 192 kHz, the time smearing artifacts reportedly are compensated for while the file size comes close to a PCM at 44,1 kHz and 16 bit. Meridian (ie Craven and Stewart) had already developed a reconstruction filter that  to a degree compensated for time smearing (the apodizing filter) that sounds very 'right'. Hence my enthusiasm for MQA.

Hans

 73 
 on: March 20, 2015, 10:52:26 am 
Started by PeterSt - Last post by PeterSt
USB tweakers ...

We just tried a Clairixa without the power wires. That does NOT work. That is, not for the NOS1a. Still the NOS1a does not use the power. But maybe there's more to this than I figured in advance;

With the ground connected it does work.

Now, without sorting it all out at the technical level I would say that the differential setup of USB can allow to let it work without explicit ground, because differential creates its own ground. This is not entirely true per se, which is why I said can. Now :

I know some of you have tested the USB connection by leaving out "the power". But what did you actually do ?
So for instance, you can tape the plus wire (in the connector) alone, but you can also tape the ground wire. Virtually we over here did both and that does not work. Tape only the plus wire does work ...
Or if you have/had a cable without the power connection in there, was that also without the plus wire ?

Please let me know your experiences, with the notice that very far theoretically the NOS1a can behave differently here than the normal NOS1. This is about the isolation in the NOS1a ...

Thanks !
Peter

 74 
 on: March 20, 2015, 02:22:30 am 
Started by charliemb - Last post by Robocop
I guess we can look forward to a new upgraded Xxhighend soon!!!

How will you find time to make the Clairixa's?

Robert

 75 
 on: March 19, 2015, 08:33:35 pm 
Started by PeterSt - Last post by PeterSt
For Alan and maybe others ...

Extension cable can also be constructed (hence produced) and works ...

Peter

 76 
 on: March 19, 2015, 08:29:00 pm 
Started by charliemb - Last post by PeterSt
So ...

I think I just spent 3 days of tuning filters for 768, 384 and 192 (not for 96). All tested with 16/44.1.
And that was even by automation (let the program change the filter parameters automatically and meanwhile watch the analyser).

All with the least of ringing and all without changing the phase anywhere.

And the change in SQ ?
hahaha ho ho ho
Not a downside that I can hear (all is as accurate) - only upsides.

Peter

 77 
 on: March 19, 2015, 06:02:43 pm 
Started by brunok - Last post by PeterSt
Hans,

With the getting acquainted now behind us, what about the real content ?

Btw, if we talk about Streaming as such ... that is what Tidal offers. Or the same thing Squeezebox ever back invented.
Do we agree ? ... this is how I judge videos when I watch them anyway.
So possibly you were not Streaming back in the days, but just playing music from a computer (and then especially from the one where the playback software runs too).

So Yes, MQA will be offering a better bandwidth for that, so to speak. Now what about my comments on that ?


Meanwhile, when you have read all the AES papers and patents, maybe you are *the* person to tell us - and especially me - why DSD would be better one over PCM. And I said "better" and I do not talk about that you (or anyone) likes it better. Thus, technically.
On this forum there's hardly talk about it, which does not mean I personally don't like to (and I did so in 1000s of posts elsewhere). Also, if I work on a "best ever" DSD D/A converter (for years)- only to find out myself with apples and apples comparison, this is a quite stupid task and I like the good theories better. But not many around to lay them out, unless biased for whatever reason.

Thanks,
Peter

 78 
 on: March 19, 2015, 05:40:38 pm 
Started by brunok - Last post by PeterSt
So were it about persons and such ...

I was the most surprised to see a Dutch "guy" doing such a video in the first place. Along with that, a name of fame (to me). Hats off only, actually.

But what I don't like about such YouTubes is nowadays general approach with one means only : Likes. The forest and the trees thing. A million of them around from how to iron a shirt to how to water plants. And how to reboot a PC of course.

You will not know it, I suppose, but quite regularly people come up with similar and I can not recall one I did not debunk. Not because I like to debunk everything and all, but because it is a tad too easy to make the videos with content which really is about something; they are not meant to. But it can bring a living (I heard).
However ...
Wat I see happening just the same is the by now sheer impossibility for someone like you, being an artist in itself, to create a nice "readable" piece of audio-story in a magazine (it doesn't go too well in that line of business). So what to do. Create a YouTube (and a few more).

My first post became that "vague" as I described it, because I can't stand the "mood" springing from such videos;
People do their best to point them out when they feel it could be important (just like Bruno did in this case) and the people creating them, also do their best for a felt good cause.
But only the best videos are the best and worth while. And now so much more is to it, if it isn't to come across as the necessity of Likes only. And in this field ... too much of them.

I made the connection with DSD, only because you did not mention it, but IMHO should have. Not that *I* personally like DSD, but if it is about the space requirement anyway ...
I just looked back but my remark about you not liking DSD was a plain mistake; I read a text on a page from PvW where he quotes you (the Audirvana thing) to next express about DSD in the next sentence which is *his* thinking.
Apologies !

Best regards,
Peter


 79 
 on: March 19, 2015, 05:00:51 pm 
Started by brunok - Last post by PeterSt
Dear Hans,

Can I tell : I love it that you found this (so quickly) and are so kind to respond. And I am dead-serious. Also, I knew in advance that I could challenge for this, but did not expect it to happen.

This is only a first response, about good intentions and such.
I'll try to have a next response as well, maybe this time showing a little more respect.
Otherwise feel free what you want to say really, with the notice that we are "Dutch" anyway.

Sincere thanks ...
Peter

 80 
 on: March 19, 2015, 04:54:20 pm 
Started by brunok - Last post by Hans_Beekhuyzen
Hi Peter,

Thanks for your kind judgement on my youtube video. Indeed, I'm trying to hype MQA and I love to have Likes. But there are only a few things you got not completely right:
- I was streaming audio when the rest of the world still thought it could never equal cd-players. BTW I also published an ibook about it (File Based Audio aka Streaming Audio).
- I do love DSD (as you could have found out easily if you had visited my site). I was amongst the first to have a DAC that supports DoP (Chord QDB76HDSD).
- I do know what can be achieved, I was the editor in chief of the Dutch Pro Audio Video magazine for 21 years, visited many studios in the Netherlands, Belgium Singapore, Japan and the UK.
- I did read all technical documentation, including the AES papers and patents. have you?

It's easy to judge on other people, it's hard to give decent comments. Q.E.D.

Best regards
Hans Beekhuyzen

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