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.