Martha Argerich: Early Recordings
Beethoven: Piano Sonata 7 in D, Op.10 No.3. Mozart: Piano Sonata 18 in D, K.576. Prokofiev: Toccata, Op.11; Piano Sonatas 3 in a, Op.29 & 7 in B-flat, Op.83. Ravel: Gaspard de la Nuit, Sonatine.
Martha Argerich, piano
Deutsche Grammophon 479 5978 (2 mono CDs). 2016. No prod. or eng. credits given. ADD. TT: 2:10:50
Performance *****
Sonics ***½

There is no dearth of recordings by the great Argentine pianist Martha Argerich—over 150 are listed in her discography—and here, in honor of her 75th birthday, are two more discs, comprising previously unreleased material. Argerich has been playing publicly since she was eight years old; in 1957, she won the Busoni and Geneva competitions and continued to concertize, but it was not until she won the Chopin Competition, in Warsaw, in 1965 that she began to become a household name (in pianist-loving households). There is a rumor that she has never given a bad concert or made a poor or uninteresting recording; this new set does nothing to contradict it.

With Sony's latest flagship single-box player ($1700), we find yet another variant on 1-bit D/A technology—High Density Linear Converter, or HDLC. At the heart of this Pulse Length Modulation (footnote 1) D/A technique is Sony's CXD-2552 Pulse D/A converter (two per channel in complementary mode in the CDP-X77ES). This complex LSI chip incorporates a third-order noise shaper, the PLM converter, and a digital sync circuit receiving its input from the system clock.

California dealers The Audio Salon in Santa Monica and Sunny Components in Covina, Delaware's Overture Audio Video in Wilmington, and Canada's Advance Electronics in Winnipeg and Atlas Audio Video Unlimited in Victoria are all presenting special events this weekend.

I'm at Dan D'Agostino's house listening to his triamped Apogee full-range ribbon speakers. It's 1985. His listening room is immense, easily 30' by 45', and we're rocking out to Led Zeppelin and Bonzo Dog Band records. The sound is light-years better than anything I've heard—dynamic as hell, beyond vivid, and the soundstage has infinite depth—and Dan's obviously loving that I'm blown away by his system. We get to talking. He has three pairs of Krell KMA-160 monoblocks and Reference KRS preamps for me. Thanks, I say, but how can I get them home? No problem—Dan has a van.

How do you rate as an audio expert? Test yourself on these 25 questions.

All of the following are multiple-choice questions, dealing with things that every audio hobbyist should know, either before or after completing the test. Most of them are easy, but take your time in answering and don't jump to conclusions. Some of the questions are quite tricky, and wrong answers will be subtracted from your final score, so read them and the possible answers carefully before committing yourself. Don't guess if you aren't fairly sure.

Wednesday 19 October, 6:00–9:00 pm, Manhattan dealer Innovative Audio (Architects & Designers Building 150 East 58th, Street Level, New York City), is hosting Wilson Audio's Peter McGrath, who will be presenting the new Alexx loudspeaker. Refreshments will be provided. RSVP by phone to (212) 634-4444 or via email.