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Armando Anthony "Chick" Corea belongs to that elite cadre of pianists that includes Herbie Hancock, Keith Jarrett, and Mccoy Tyner, pioneers who reshaped the jazz or- der starting in the early 1960s and continued to make strides into the present day.

The now-78-year-old Corea's attainments are many: composer of the standards "la fiesta," "Spain," "500 Miles High," "Matrix," and "Windows"; winner of 22 Grammy Awards (and 64 nods); founder of at least six colossal improvising units (Return to Forever I and II, Circle, the Three Quartets quartet, the Chick Corea Elektric Band, the Vigil Quintet); popularizer of early monophonic synthesizers, and recipient, in 2006, of an NEA Jazz Masters award.

99% True: Almost a National Bestseller, by Paul McGowan. Lioncrest Publishing, 2019. 364pp. $25.00, hard cover; $15.99, paperback; $9.99, Kindle e-book.

To many audiophiles, high-end audio manufacturers must seem like monolithic entities, enduring for what seems like forever, like cliffs beside a familiar path. But as Paul McGowan explains in this unputdownable autobiography (footnote 1), behind the facade of stability things can be in financial turmoil, with success equally as risky as failure.

In a late-August newsletter, PS Audio announced a major change in how it does business. In the United States, its home market, the company stopped selling its products through dealers and opted for a direct, online-only sales model. Outside the US, it will continue to sell through authorized dealers.

Descriptions of the sounds of products from Sutherland Engineering nearly always include "refined." While that word is certainly justified, it would be more apt to use it as a verb: Ron Sutherland spends more time than any audio designer I've known studying and fine-tuning and refining every detail of his work. I have the impression he knows those products so well that when he decides to design a less expensive version of his newest and best models, he knows exactly what to do.

The Vivaldi—the four-box flagship product from digital audio specialists dCS—is, in my opinion, misnamed. Vivaldi the composer was an asthmatic priest who worked in an orphanage for 30 years and died in poverty. The Vivaldi stack dedicates four separate products to converting into music digital code stored on silver discs (although you can play music—very well I am sure—on just one box, the Vivaldi DAC, footnote 1). Together, those boxes weigh about 148lb and cost some $115,000. The most expensive is the CD/SACD transport; leave that off and you can save 51lb and $42,000.

Accustic Arts of Lauffen, Germany, was founded in 1997 by Fritz Schunk, who sold the company to Hans-Joachim "Jochen" Voss in 2016. Voss's professional background had more to do with sweet spreads than sweet sounds—he spent 20 years doing sales and marketing, including with the Ferrero Group, which produces Nutella—but he happened to own some Accustic Arts components, and as a music-loving consumer with a special fondness for rock, had been in touch with Schunk for many years before the company went up for sale.

BBC LS5/5? I'd never heard of it until it was announced on my Facebook feed that the LS5/5 was Graham Audio's new flagship speaker—so new, in fact, that there were only two pairs in existence. One of them would be showcased that evening in a Montreal audio shop, Art et Son, for the model's official North American launch.