Peter W. Mitchell

When you graduate from mass-market hi-fi to high-end audio, one of the first things you notice is that audiophile gear dispenses with the gadgets and gimmicks that clutter up the front panels of most stereo receivers and integrated amplifiers. The dominant philosophy in mass-market design is that features sell products: the more functions a product has, the more desirable it will seem in the store. High-end designers, on the other hand, prefer the KISS approach: Keep It Simple, Stupid!

Editor's Note: One-bit DAC chips in the 21st century, where the analog output signal is reconstructed from a very high-rate stream of pulses, are ubiquitous. But a quarter-century ago, those chips were only just beginning to stream from the chip foundries. In this feature, we aggregate Stereophile's 1989 coverage of the then-new technology, starting with Peter van Willenswaard on the basics.—John Atkinson.

1989 may well become the year of the D/A converter (DAC). CD-player manufacturers have, almost without exception, launched research projects focusing on this problem area of digital audio; many of these projects are already a year old. This is, however, by no means the only imperfection keeping us away from the high-quality sound we have come to suspect is possible with digital audio media, and maybe not even the most important.

Editor's Introduction: In 2013, lossy compression is everywhere—without lossy codecs like MP3, Dolby Digital, DTS, A2DP, AAC, apt-X, and Ogg Vorbis, there would be no Web audio services like Spotify or Pandora, no multichannel soundtracks on DVD, no Bluetooth audio, no DAB and HDradio, no Sirius/XM, and no iTunes, to quote the commercial successes and no Napster, MiniDisc, or DCC, to quote the failures. Despite their potential for damage to the music, the convenience and sometimes drastic reduction in audio file size have made lossy codecs ubiquitous in the 21st century. Stereophile covered the development of lossy compression; following is an article from more than two decades ago warning of the sonic dangers.—Editor

I had a wonderful chuckle while reading the reviews of the Finial Laser Turntable in the May 1990 issue of HFN/RR. Perhaps I should preface this by saying that, in the entire quarter-century since I became intensely involved in audio, I have always found the LP an unsatisfactory playback medium for music. As a regular concert-goer in Boston and an addict of WGBH-FM's simply miked, virtually unprocessed live broadcasts of BSO concerts direct from Symphony Hall, I never learned to ignore the many anti-musical distortions endemic to LPs—the ticks and pops, the inner-groove congestion and tracing distortion, the harsh mistracking of high-level climaxes and overcut grooves, the persistent static in dry winter air, the constant slight wow due to off-center spindle holes, the muddy bass due to resonances and feedback, the universal cutting engineer's practice of blending low bass into mono (which wipes out low-frequency hall ambience).