Digital Processor Reviews

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Art Dudley  |  Jan 24, 2011  |  0 comments
There's home cooking on one side of the hedge and fast food on the other, and the world moves farther from the former and nearer to the latter with each passing day. So it goes in domestic audio, where virtually every new milestone of the past quarter-century has pointed far more toward convenience than toward quality.

Depressed? Don't be. Those of us in the perfectionist community have a history of dealing with such things, howsoever slowly and inefficiently. (footnote 1). We're getting better at it, too, year by year. An example: Chord Electronics, of sunny southern England, has now brought to market their Chordette Gem D/A converter ($799) which they offer as an affordable means of getting perfectionist-quality sound from computer-music files.

John Atkinson  |  Jul 20, 2002  |  0 comments
Such is the pace of development in digital technology these days that it is hard not to become convinced that digital playback is a solved problem. The measured performance aberrations are so low in absolute level—and, more important, so low compared with the typical threshold of human hearing—that it is difficult to see why digital components should sound different from one another.
John Atkinson  |  May 18, 2017  |  21 comments
Fifteen years? Has it really been 15 years since I reviewed what was then the flagship D/A processor from English company Chord Electronics? In the July 2002 issue, here's how I summed up my review of the Chord DAC64: "While the Chord Electronics DAC64 is undoubtedly expensive, it is eye-poppingly gorgeous. . . . many listeners should find its silky-smooth highs seductive, as well as its slightly larger-than-life lows." How times and prices change—the "undoubtedly expensive" DAC64 cost only $3040! I did make a couple of criticisms of the DAC64 in my review, but according to Wes Phillips, in his August 2007 review of Chord's revised DAC64, "the Choral Blu [CD transport] and Choral DAC64 are, together, the CD player we music lovers have long prayed for"—even if, five years after my own review, the DAC64's price had risen to $5000.
Jon Iverson  |  Oct 21, 2015  |  3 comments
The British company Chord Electronics has always seemed to me to be audio's crazy uncle: Crazy like a fox, maybe, but definitely marching to their own tune. Their casework design often borders on the gratuitously provocative, challenging audiophiles' ideas about good taste. Yet many of my audio pals swear by the sound of Chord components, and I've heard them shine in many respectable showrooms.
John Atkinson  |  Jan 27, 2016  |  29 comments
Like all men, I learned at an early age to resist the allure of a pretty face.

Okay—I learned that I should try to resist the allure of a pretty face.

Okay, I confess: I have never been able to resist the allure of a pretty face. Which is why, when I first clapped eyes on the Mojo D/A headphone amplifier from English company Chord Electronics, at an event hosted by Manhattan retailer Stereo Exchange, I had to borrow a sample for review.

John Atkinson  |  Aug 31, 2012  |  First Published: Sep 01, 2012  |  5 comments
I was setting up for some musical demonstrations I was to present for a Music Matters evening at the ListenUp! store in Boulder, Colorado, in May 2011. For these events, an audio store invites manufacturers (and the occasional journalist) to demonstrate to local audiophiles the musical benefits of high-end audio playback. In Boulder, I was to share the store's big listening room with Dave Nauber, president of Classé Audio, who had set up a system with B&W Diamond 802 speakers, a Classé stereo amplifier, and a preproduction sample of Classé's new CP-800 preamplifier ($5000), all hooked up with AudioQuest cable. I unpacked my MacBook, with which I was going to play the high-resolution master files of some of my Stereophile recordings, and looked around for a DAC. There wasn't one.
Jonathan Scull  |  Feb 27, 1999  |  0 comments
I've heard it all a thousand times before:
Michael Fremer  |  Jan 21, 2011  |  0 comments
Don't have $80,000 to drop on dCS's four-component Scarlatti SACD stack that I reviewed in August 2009, or $17,999 for their Puccini SACD/CD player that John Atkinson raved about in December 2009? Even if you do, the new Debussy D/A processor ($10,999) might be a better fit for your 21st-century audio system. Sure, you don't get an SACD transport—or any kind of disc play, for that matter—but the odds today are that you already have a player you like that's got an S/PDIF output that can feed the Debussy.
John Atkinson  |  Jul 27, 1997  |  0 comments
Things are changing rapidly in the world of professional digital audio. After a decade of stability, with slow but steady improvement in the quality of 16-bit, 44.1kHz audio, the cry among audio engineers is now "24/96!"—meaning 24-bit data sampled at 96kHz. Not coincidentally, DVD offers audiophiles a medium with the potential for playing back music encoded at this new mastering standard.
John Atkinson  |  Dec 14, 2009  |  0 comments
It's now 10 years since the launch of the two high-resolution audio disc formats, SACD and DVD-Audio. Yet, perhaps partly because both were hobbled in various ways to please the record industry, perhaps partly because too many supposed hi-rez releases sounded no better than CD, and perhaps partly because record retailers weren't sure how to display the formats to their best advantage, neither took off in any substantive way. DVD-A disappeared, and SACD survived only as a niche format for high-quality classical releases in both two- and multichannel forms. As we got deeper into the same decade, digital technology, despite various sparks and flashes, went into the doldrums. Mainstream digital technology was increasingly concerned with squashing the music into fewer and more portable bits, not with increased sound quality. Even the concept of "CD sound quality" began to seem an unattainable goal, as MP3 files became the dominant music carrier.
Jonathan Scull  |  Jan 25, 2001  |  0 comments
The dCS Purcell is named after Henry Purcell, the English composer, organist, bass, countertenor who was born in 1659 and died in, alas, 1695. It's a digital/digital converter intended for consumer use, as opposed to the less elegantly packaged pro-audio version, the dCS 972, that I reviewed in February 1999. Both devices increase the sample rate and/or word length of the output from linear PCM digital audio sources like CD or DVD up to a maximum sample rate of 192kHz and a word length of 24 bits. According to the extensive documentation, this is achieved by "using extremely powerful and accurate digital interpolation filters, which yield an output signal having negligible levels of distortion."
John Atkinson  |  Nov 18, 2016  |  3 comments
It has been 20 years since I first became aware of the British company Data Conversion Systems, which manufactures audio products under the dCS brand. Rather than use off-the-shelf conversion chips, the groundbreaking dCS Elgar D/A converter, which I reviewed in our July 1997 issue, featured a then-unique D/A design that they called a Ring DAC. This featured a five-bit, unitary-weighted, discrete DAC running at 64 times the incoming data's sample rate—2.822MHz for 44.1kHz-based data, 3.07MHz for 48kHz-sampled data and its multiples—with upsampling and digital filtering and processing implemented in Field Programmable Gate Arrays (FPGAs). Oversampling to a very high sample rate allows the word length to be reduced without losing resolution, and use of a low-bit multi-bit DAC makes for very high accuracy in the analog voltage levels that describe the signal. (If this seems like voodoo, for a given signal bandwidth, bit depth and sample rate are related. To oversimplify, double the rate, and you can reduce the bit depth by one bit while preserving the overall resolution.)
Michael Fremer  |  Aug 18, 2009  |  0 comments
Is anyone in this economy shopping for a four-box, rack-swallowing, two-channel SACD/CD player contending for the state of the art and costing $79,996? dCS is betting that its Scarlatti will attract a small crowd of those wealthy music enthusiasts who, in any economy, reliably pony up for the best. For the rest of us, the Scarlatti will be a spectator sport.
Art Dudley  |  Jan 18, 2005  |  0 comments
Giuseppe Verdi gave the world more than two dozen operas, some good sacred music, and one string quartet. He also provided the young Arturo Toscanini with one of his first big breaks—conducting the singing of "Va pensiero" at his burial procession—and gave the flagship consumer product from England's dCS Ltd. its name. That the latter two gestures were posthumous and unwitting does nothing to diminish their poetry.
Michael Fremer  |  Apr 13, 2003  |  0 comments
Well into dCS managing director Mike Story's attempted explanation of upsampling, there came an epic moment when the ever-expanding universe of his thoughts—which we had been following to new heights of digital enlightenment—broke free of our collective grip, snapped back on itself, and caused a conceptual implosion of nearly cataclysmic proportions. The blank, spent expressions on the faces of the journalists gathered in the small attic-like meeting room at dCS's Great Chesterford (UK) facility all seemed to say, "What the hell was that? Was it just me, or did you feel that too?"

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