John Atkinson

When Jason Victor Serinus visited the Bluebird Audio room on the Venetian's 35th floor, he mentioned that Chord was demonstrating its Blu Mk.2 CD transport ($11,788) along with the Dave DAC that I reviewed and was impressed by last June. I chatted with Chord's digital guru Robert Watts (above in photo) about the new transport and he mentioned that it incorporated his latest WTA (Watts Transient Aligned) digital filter with a million taps! (The more taps there are, the closer a DAC can reproduce the timing information in the reconstructed analog signal—see my DAVE review for why Robert feels why this should be so.) I was puzzled, as a digital reconstruction filter belongs in a DAC, not a transport.

If there is one thing that raises the hackles of engineers, it is audiophiles' insistence that power cords affect sound quality. But at CES, AudioQuest's Garth Powell (right in photo, with AQ's Alex Brinkmann) was showing how changing just one cable in a system, the one connecting a Simaudio Moon CD player to a Niagara 700 power conditioner, could make or break the system's sound quality. Playing a track from Muddy Waters' Folk Singer, with Moon amplification and Magico S1 Mk.2 speakers, and without changing the volume, Garth compared AudioQuest's new Thunder cable ($700) with AC cables from other companies priced up to $18,000, culminating with the AudioQuest Dragon ($4000).

An economy of information transmitted . . . what was encoded was only what was needed, nothing more. (footnote 1)

As I wrote in the January issue's "As We See It," Master Quality Authenticated (MQA), the encoding/decoding system developed by J. Robert (Bob) Stuart and Peter Craven, has been widely criticized, despite reports in this magazine and others that MQA-encoded files tend to sound better than the PCM originals from which they were derived. Also in last month's issue, Jim Austin investigated the time-domain performance of the MQA reconstruction filter and I examined some of the more general aspects, ending with: "Other criticisms of MQA involve its implications for the recording industry, for manufacturers of audio products, and for consumers. I will examine those in next month's 'As We See It.'"

"The fundamental problem of communication is that of reproducing at one point either exactly or approximately a message selected at another point."—Claude Shannon

Since its announcement at the end of 2014, Master Quality Authenticated, the MQA encoding/decoding system, has spawned outspoken criticism. Some of the more thoughtful negative reactions have come from engineers such as Dan Lavry, Bruno Putzeys, and Daniel Weiss. Others have been expressed by manufacturers of digital products: the late Charley Hansen at Ayre Acoustics, for example, along with Jason Stoddard and Mike Moffat at Schiit Audio, John Siau at Benchmark Media Systems, and Jim Collinson at Linn Products. Some have been audio writers: Doug Schneider, at SoundStage!, and Paul Miller and Jim Lesurf, at Hi-Fi News. Most vociferous have been anonymous website posters. As Jim Austin remarks in his examination of MQA's decoding of impulse-response data elsewhere in this issue, "the nastiness online is unprecedented."