JVS Cheerleads an MQA CD..Sis Boom Bah!

[mansr]

I really would like to get my hands on a track or two ripped from an MQA CD.

[mansr]

16 minutes ago, Brinkman Ship said:

I would assume it is no different than the Tidal stream.

A CD is 16-bit. Tidal MQA is delivered in a 24-bit container.

[mansr]

9 minutes ago, NOMBEDES said:

According to Stereophile the FIRST MQA CD will not be available until March:

 

On March 17, Japanese label Ottava will release the first MQA recording on compact disc, A. Piazzolla by Strings and Oboe. Recorded by the UNAMAS Piazzolla Septet, whose videos you can view online, the short disc was mastered by the Tokyo-based label's CEO, Mick Sawaguchi. The recording is also available for download.
Read more at https://www.stereophile.com/content/mqa-encoded-cds-yes#qSb2o2FXeTrGDSg0.99

That was a year ago, March 2017.

[mansr]

21 minutes ago, Brinkman Ship said:

Ok, will do so as to not cause you any headaches.

 

But for the record Mr. Atkinson has zero to complain about. I attributed the author, used quotes, and

linked back. He is clearly being petty IMO. Fair Use principles are clear as day.

Stereophile and friends are well-known to scream bloody murder over a single copied punctuation mark if they are being criticised. That's what it's all about, shutting down dissenting voices.

 

It's tempting to put little quotes on some Chinese pastebin site and link to those instead of the original article.

[mansr]

49 minutes ago, Brinkman Ship said:

Yes, I thought you were referring to the "unfolded" track. 

I want to see how they've allocated the bits in a 16-bit delivery format compared to the usual 24-bit. Something has to have been dropped.

[mansr]

38 minutes ago, Teresa said:

If the MQA encoding requires 7-bits of a 24-bit file making the resulting MQA file 17-bit (assuming the same coding for CD) would that effectively make an MQA-CD 9-bit? Or am I dumb and not understanding this? 

The split between baseband PCM and MQA data isn't fixed.

[mansr]

55 minutes ago, Brinkman Ship said:

....people can claim anything they want...so you are a copyright lawyer?

It doesn't matter who is right. Chris is being harassed by Stereophile/TEN, and this isn't worthwhile picking a fight over.

[mansr]

3 minutes ago, The Computer Audiophile said:

Your characterization of most people here is ill-informed. 

There are all sorts of people here, some fitting the description he gave.

[mansr]

6 minutes ago, crenca said:

Unless I have missed it - there is no known method for measuring this at this time is there?

My mqascan tool will tell you.

 

6 minutes ago, crenca said:

Also, want to take a wild questiment as to how much real bit depth there might be on an "MQA CD"?

That would depend on the data split.

[mansr]

1 minute ago, Spacehound said:

This is what I posted. And meant

 

"Here mostly it's people not being  ignorant  of science"

 

So yes. you did misunderstand.

I take it your "here" wasn't in reference to all of CA but to those you respond to in what some perceive to be a hard tone.

[mansr]

1 minute ago, Spacehound said:

"It reduces everything to about 17.4 bits" - Stuart

 

Hmm.

In a 16-bit container? Hardly.

[mansr]

5 minutes ago, christopher3393 said:

Just wondering if English is a second language for you? No problem. But sometimes your grammar and usage are problematic. This makes communication more difficult. People often make errors here because of hurrying. Perhaps if you would consider slowing down just a little it could improve the quality of your communication. Perhaps your breakneck pace is undermining your coherence at times?

I have no trouble understanding him. Perhaps you're having trouble with the Southampton accent.

[mansr]

10 minutes ago, crenca said:

I have not seen Christopher3393 contribute anything since the majority of regulars disagreed with his ideas in the "civility thread" (can't recall - did he not start that thread as well?).  I have only seen him pop up here and there to complain about "tone" that he does not agree with.

He's made a handful of posts in the Album of the Evening and Song of the Day threads, but in a quick scan of his recent posting history I see something like 90% complaining about other people.

[mansr]

An MQA CD contains PCM+MQA data stored in standard CD format, no outer FLAC compression. Any CD transport can send this to an MQA DAC for decoding. A standard CD player will simply play such discs as PCM, just like an MQA file can be played in reduced quality on a non-MQA DAC.

[mansr]

Just now, Norton said:

Presumably though you'd need a DAC that accepted MQA over coaxial (as the usual output of a CD transport), which I thought was quite unusual?

Yes, that would be a requirement. I believe the MQA-enabled Mytek DACs can do this.

[mansr]

6 hours ago, Indydan said:

Is it possible to use a CD transport, and send the MQA bitstream to an MQA capable DAC by USB or spdif?

That's how I assumed it would be handled. From what I've read, the disc has a 16-bit MQA stream (rather than the usual 24-bit) encoded in standard CD format readable by any player.

[mansr]

15 minutes ago, mav52 said:

Did you intentionally covered up the right corner.

Looks pretty intentional to me. Besides, everybody has been talking at length about the MQA article series currently running in Stereophile. You don't need the table of contents to know it's there. What a troll.

[mansr]

1 minute ago, realhifi said:

Nope. Mine has a label spot and as yiu can see, no MQA mention. I was merely covering my name and address.

 

Still bloody disingenuous of you to post this. You know, as do we all, that there are MQA articles in that issue.

[mansr]

17 minutes ago, realhifi said:

How many ways should I apologize for missing the pg 51 article in the contents in Stereophile?  As many as the apologies I’ve gotten from people saying I covered up the cover disengeuously?  

I find it hard to believe that you "missed" it when you've been so busy posting in the thread here discussing that very article. I'll accept, however, that you may have been unaware of the news stand cover with an MQA highlight in the corner you covered.

[mansr]

21 minutes ago, FredericV said:

The truncated version does not light up the blue quack light on my DAC.

No green light either?

[mansr]

4 minutes ago, FredericV said:

Original MQA file 2L-050_01_stereo_DXD_WAV.mqa.flac shows blue light and renderer upsample resolution:

 

2L-050_01_stereo_DXD_WAV.mqa.truncated-16b.wav
+ 16 bits packed in a 24 bit file (2L-050_01_stereo_DXD_WAV.mqa.truncated-24b.wav) both show:



Note that the MQA light is off and not green.

Did you check with mqascan that the MQA data is still there?

[mansr]

2 minutes ago, FredericV said:

Those tools are compiled on a raspberry somewhere, need to find it and boot it. But when I find it I will check it.

The scanning tools will work on any Linux system. They don't use the Bluesound libraries.

[mansr]

9 minutes ago, Samuel T Cogley said:

For me, the crux is simply this:  For reasons I neither understand, nor care to understand, you present yourself as some kind of "deputized" civility patrol for the forum.  Based on my interactions with you, you seem to be stubbornly unaware of your pomposity.  If you want to start another civility thread, by all means do so.  But because you have demonstrated to me that you only post in these types of threads to service your own dogmatic fixation with civility, there is zero to be gained by any back and forth.  I'm sure almost everyone on the forum would agree that it's excruciatingly banal.

And by civility, he actually means non-dissent.

[mansr]

Just now, Samuel T Cogley said:

I think he's just pining for the old days of the forum.  At some point, a crusade against incivility becomes quixotic.

He should just go join Steve Hoffman or SBAF then.

[mansr]

16 hours ago, FredericV said:

2. MQA decoding of the truncated version will still generate some fake ultrasonic content between 20 and 26 Khz because of their leaky filters, which some may misread as actual content. We measured the truncated MQA files after decoding, audio from the baseband is aliased into the ultrasonics.

Here's a spectrum plot showing this. Note the symmetry around the dashed line at 22.05 kHz.

 

I believe this is the result of resampling to double rate using this filter:

 

Frequency response: