Digital Processor Reviews

I am a lucky person. Who gets to be an artist, an aspiring griot, and a Stereophile reporter? Who gets to stay at home in paint-smeared pajamas, draw pictures of teapots and barn owls . . . and then, on top of everything, gets paid to listen to music made by Henryk Szeryng, Eugene Hütz, and Winston Reedy? C'est moi!

I have groovy friends, too: other eccentric artists, scruffy musicians, recording and mastering engineers, beekeepers, authors and editors, art and junk collectors, tube wizards, turntable savants, DJs, Mensa-type amp designers, bat-shit-crazy poet-philosophers, and unrepentant hoarders.

Approximately 33¹/₃ years after AudioQuest's first phono cartridge, the company announced two new USB D/A headphone amplifiers: the DragonFly Black ($99) and the DragonFly Red ($199). Both have circuits designed by the engineer responsible for the original DragonFly—Gordon Rankin, of Wavelength Audio—and both have the novel distinction of requiring considerably less operating power than their predecessors, so much less that the new DragonFlys can be used with iPhones, iPads, and various other mobile devices.

Simaudio saw disc-based digital audio in its rear-view mirror at least as far back as 2011, when it introduced the Moon Evolution 650D and 750D—two iterations of what it called a "digital-to-analog converter CD transport." These were actually multiple-input CD players, but Simaudio was evidently so eager to distance itself from the spinning disc that it went with a product category that, in spite of its cumbersome, run-on name, drew a clean line between the disc-reading and signal-processing functions—while bestowing upon the former second-class citizenship.

I was lying on a mattress on the floor of an empty apartment on Manhattan's Upper West Side. Not as grim as it sounds—it's a nice apartment, and the mattress was new, and had just been delivered—but it was hot (no air-conditioning), and my family and my furniture were still in my condo up in Maine, and I was lonely. I needed some cheering up. Which is how I rationalized the decision to buy an Explorer², Meridian Audio's tiny, inexpensive ($299) digital-to-analog converter.

Researchers at MIT recently discovered a "music channel" in the human brain. These neural pathways respond to all kinds of music—and only to music. "A listener may relish the sampled genre or revile it," Natalie Angier wrote in the New York Times. "No matter. When a musical passage is played, a distinct set of neurons tucked inside a furrow of a listener's auditory cortex will fire in response"

Apogee Electronics Corp. has been in business for 30 years, and I've always thought of them as one of the pro-audio companies responsible for moving digital in the right direction. They've made their mark in recording studios around the planet with digital-audio interfaces and master clocks that have long been considered some of the most technically and sonically advanced, and that were probably used in a high percentage of the recordings in your collection. So when I saw Apogee pop up at the consumer end of the market with a technically unique product, budget-priced at $295, it got my attention.

UpTone Audio's USB Regen is a powered, single-port USB 2.0 hub that takes the USB signal from your computer, regenerates (ie, reclocks) the data, provides cleaned-up 5V power from a built-in, ultra–low-noise regulator, and sends an impedance-matched signal to your DAC. The Regen is designed to sit as close to your DAC as possible; UpTone supplies a male/male USB A/B adapter—a solid, double-ended plug, which they recommend over the 6"-long male/male USB A/B cable they also provide.