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.

By the time you read this, in the fall of 1967, the "Dolby system" will probably be old hat to you. Every other audio publication has been describing it, discussing it, and hailing it as the greatest invention since sex.

We've seen that kind of press ballyhoo before, about such significant advances as the Edsel, the 16-rpm LP and the "thin-profile" loudspeaker, so our first inclination was to be a wee bit skeptical of the Dolby. It seemed too good to be true.

As I was scanning the comments under Jason Victor Serinus's insightful piece, "What If They Gave a CES and Nobody Came?", Bill Leebens's words caught my eye. Being the (relatively) new audiophile on the block with high hopes to entice the masses, the concept of forming a trade body to promote high-end audio was immediately appealing to me. Dying to know more, I decided to stalk Bill and get to the bottom of this.

In 1999, I visited a friend, professor of Italian history Bill Adams, at his castle lair in the mountain village of Panzano, in Chianti, Italy. The 10th-century Castello di Panzano towers over the lush Tuscan hills, offering stupendous views. Each morning we'd walk down the mountain to the town below, where squat old men drank espresso and watched soccer at the all-in-one café/general store/post office. We toured the Roman ruins at Volterra and San Gimignano, gorged ourselves on pasta, and admired the fashionable young women.