Saturday, 18 November 2017

MUSINGS: On DSD, tagging, compression and conversion... Time for WavPack 5.


Many moons ago (back in 2013), I discussed DSD audio. While over the years I've talked about DSD from a a number of different angles (eg. JRiver realtime conversion listening, PCM <--> DSD conversion, conversion 2015, equipment DSD playback measurements like PonoPlayerTEAC UD-501 / Oppo BDP-105 / Oppo Sonica DAC), concerns from that very first discussion about DSD still irks me these days!

The main issue is simply this: the lack of ability for gear and software to support both tagging and data compression when dealing with DSD. This IMO truly has been a ridiculous state of affairs for so many years! Despite years of cheerleading in the industry and even smaller sales outfits like NativeDSD Music already putting files out there for consumers, the relative inelegance of it all is rather silly.

As usual, I find it rather baffling that the typical mainstream audiophile press remains silent on deficiencies like this. To me, it is issues like these, while perhaps not "sexy" nor provides the press something to market to consumers, that when addressed can actually move the hobby forward. Unlike yet another megabuck product that provides a few minutes of eye-candy at best and affects the few, "infrastructural" changes can affect the many. Yet another example of the myopia of the audiophile press and an inability to muster any leadership in changing the industry and hobby in meaningful ways.

Sunday, 5 November 2017

HOWTO: AMD Ryzen 7 1700 overclocking to 1800X speed while maintaining power savings...


Greetings from Asia.

Okay with all the recent chatter on MQA, let's take a little break from audio for a bit and talk about something much less controversial :-). In fact, this is downright basic for all the computer overclockers out there...

Remember a few months ago, I upgraded to the AMD Ryzen 7 1700 CPU. As discussed in my previous article, I upgraded to a computer with this processor for workstation purposes, not gaming or anything like that. I've certainly been impressed by the speed already but as one who enjoys tinkering with the machines, I thought it would be fun to try overclocking without sacrificing power efficiency...

Sunday, 22 October 2017

MQA: FINAL "Final" comments... Simply put, why I don't like MQA.

Looks like an interesting art exhibit :-).
I know... I said the previous post was "final". But I just had to kick the horse one more time. :-) Seriously, if you're sick of MQA chatter already, don't bother reading this - you've been warned!

This past week, I added my views to this thread on Computer Audiophile (from about page 198 in an epic thread with >5000 comments!). I know that forums can get pretty heated and ugly, but it is good fun sometimes so long as you don't let it get personal - it never has to, we're talking audiophile stuff after all - first-world problems, nothing life or death. Since forum threads and comments tend to get lost easily, I thought it would be reasonable to just enumerate some main talking points in the hopes of furthering clear debate (if still necessary)...

Saturday, 14 October 2017

MQA: "Final" thoughts... On Politics & Paradigms.

Cartoon looks about right and reflective of MQA... From article here.
In the last few weeks as I was preparing the series of posts discussing the MQA blind test, I noticed The Absolute Sound (TAS) ramping up the hype again in September with two articles in defense of the value of MQA. Let's use those articles to close off discussions about MQA among other ideas at least for a bit here at The Musings...

Sure, I'll be around to add my two bits and answer questions where I can, but to be honest, I'm a little tired of MQA by this stage and how much of a big deal it isn't, IMO.

Saturday, 7 October 2017

MQA Core vs. Hi-Res Blind Test Part IV: Subjective Results & The Wrap Up...


After having gone through the "core" results and subgroup analysis from the MQA Core vs. Hi-Res PCM Blind Test, let's review and post some subjective comments gathered in the survey. This provides an opportunity for us to see how people described what they heard and since we know what the preferences were, put them in the context of whether the descriptions referred to a bias towards the MQA decode or standard PCM...

Thursday, 28 September 2017

MQA Core vs. Hi-Res Blind Test Part III: Subgroup Analysis


This is Part III of the summary and results of the MQA Core decode vs. standard PCM Hi-Res blind test following from the "core" results last week.

At this point, we know that if we look at the "big picture", evidence suggests that there are minimal audible differences. So if we dig into the data set a bit further, let's see if we can ask questions based on the subgroups identified. I'm sure many of you have been curious about some of these questions for awhile but until having access to a large enough database such as this, it's difficult to obtain answers.

Let's then ask a few questions and interrogate the database for hints...

Saturday, 23 September 2017

MQA Core vs. Hi-Res Blind Test Part II: Core Results


As you know, Part I - Procedure is now published. Within it, I laid out in detail the test, how it was constructed, and how data was collected. Today, we'll embark on the exploration of the data itself. While I will try to conclude with some general points by the end of this post, I will not have had time to analyze everything quite yet. I'm currently anticipating at least another couple of posts to fully flesh out the data set including posting some of the subjective comments made by listeners. I feel this is the only way to properly thank those who took their time and provide as much information as possible to answer any lingering questions.

Let's start... Today, let's focus on the "core" or "headline" results I think most of us are interested in. Who are the people who tested and submitted results? What overall were their preferences? What was the result for each specific track? How confident were the respondents about their choice? And how significant were these findings ultimately?

Friday, 15 September 2017

MQA Core vs. Hi-Res Blind Test Part I: Procedure


Introduction:

As you are probably aware, through the last 2 months on this blog, I've been collecting data to determine the audibility of decoded MQA versus the same piece of music originating from the "master" high resolution source. Please refer to the Test Invite article from mid July 2017.

Over the last couple of years, I have been curious about the MQA technique and followed the evolution of the "technology" as it has been touted as being the next step in digital music playback. Throughout the last 2 years, I have tried to develop an understanding of what it's doing beyond simply the superficial talk around being "revolutionary", "fundamentally changing the way we all enjoy music", nebulous claimed links to "neuroscience", or talk of bringing the "studio sound" to the consumer. If you look back, I have written articles looking at:

- Initial musings... 
- The undecoded MQA file. 
- Decoded vs. undecoded Explorer2 output. 
- Dicussions of MQA's partially lossy nature. 
- Comparison of TIDAL / MQA Decoding with "studio master" tracks. 
- Mytek Brooklyn hardware MQA decoding. 
- Discussion of digital filters and relevance to MQA. 
- Comparison between Meridian Explorer2 vs. Mytek Brooklyn ("Authentication?"). 
- Dragonfly Black MQA "Rendering" and filter. 
- Mytek Brooklyn MQA filters. 
- The "full monty" of MQA filters from the Dragonfly Black MQA-enabled DAC.

Saturday, 9 September 2017

MUSINGS: Evidence of digital player jitter with asynchronous USB DACs? Melco N1ZS20/2 review in HFN&RR...


The UK magazine Hi-Fi News & Record Review is interesting. Like Stereophile here in N. America, it includes objective measurements. Over the years, I've seen times when they have criticized questionable "hi-res" downloads showing nothing more than upsampled music. But they also seem to like "showing" rather meaningless measurements such as a few years ago with their USB cable roundup.

Recently, I believe in the May 2017 issue, they reviewed the very expensive "cost-no-object" digital server - the Melco N1ZS20/2. This device is the "mk2" of their top-of-the-line music server/player with the capability for data output through ethernet or USB connection to one's DAC.

Friday, 1 September 2017

MUSINGS: How much amplifier power do you really "need"? Why not test for yourself?


Much has been discussed about amplifier power over the years; here for a short primer, here for a contemporary take with advice from Crown, and here for an oldskool audiophile take on the matter when dinosaurs and tube amps ruled the land (notice the positive sentiment towards even low power transistor amps compared to the low-wattage tube jobs in this article!).

We often hear the question: "How much power do I need?" A very reasonable query of course when we're thinking of buying a new amplifier.

The answer to that question of course really depends on your needs. The bottom line is that it really is about your context and preferences, the quantity and quality of the amplifier you need can vary based on all kinds of factors. When it comes to quantity, it will of course depend on the efficiency of the speakers you listen to along with size of your room, distance to the listening position, placement of the speakers, and absorptive/reflective surfaces in the space.

Saturday, 19 August 2017

MUSINGS: Increasing the Dynamic Range of compressed audio with DSP... (And is this why vinyl DR is higher!?)


Sadly, the good doctor's diagnosis applies to too many of the recordings we listen to these days.

I mentioned last week a recommendation for July Talk's Touch album at the end of that post. There are a number of catchy and enjoyable tracks on there... However, if we put this album through the foobar DR Meter, unfortunately, we see an album with really nasty dynamic range compression - DR4. Yuck.

Hmmm... Is there any way to change that?

Saturday, 12 August 2017

MUSINGS: The 3 Main Home Computers 2017 (Workstation, Server, Gaming) & Thoughts on Gaming Consoles (like the upcoming Xbox One X)...


In the heat of summer, it is nice to get some time off to fix up around the house and do something that I typically take no pleasure in - rebuilding computers and reinstalling the OS & software! It requires a level of "Zen and the Art of Computer Maintenance" that I can only muster up every few years :-).

If you're like me, at home, you might have a little cadre of computers for work and personal purposes. As painful as it is, every few years, I'll update the OS, maybe tweak the hardware here and there (everything from cleaning up cables, vacuuming out dust, updating motherboard firmware and drivers, and the occasional refreshing of the heatsink compound). Updating a less "mission critical" machine like a HTPC or game machine (such as previously discussed) is not a big deal because in my view, that won't affect the others. However when I update the powerful main Workstation, I try to reuse the parts for some of my "lesser" machines; can't let perfectly good high speed CPU, RAM, and motherboard go to waste.