I do quite a bit of headphone listening during the day, making use of their convenience to shut out the office hubbub while I get down to serious copy editing. The system I use is modest—a pair of no-longer-available Sennheiser HD420SLs driven by an Advent 300 receiver I bought for $75, with CD source provided by a Denon DCD-1500 II—but I get quite a bit of musical satisfaction from it.

Editor's Note: In the 21st Century, lossy audio data compression, in the form of MP3 and AAC files, Dolby Digital and DTS-encoded soundtracks, and YouTube and Spotify streaming, is ubiquitous. But audiophiles were first exposed to the subject a quarter-century ago, when Philips launched its ill-fated DCC cassette format. What follows is Stereophile's complete coverage on both DCC and its PASC lossy-compression encoding from our April 1991 issue.—John Atkinson

There's a race on between Sony and Matsushita, to determine who can build the smallest battery-operated CD player with the most features. Sony currently holds the lead with its second-generation D-7 ($300), about 30% smaller than the first "pocket" CD, the D-5. Most of the reduction is in height; both players have a horizontal cross-section only slightly larger than the CD itself. The illusion of smallness is further enhanced by an angled front panel with beveled edges.

The three-day Capital Audiofest runs July 8–10 at the Hilton Hotel at Twinbrook Metro in Rockville, MD. With new, noon–8 pm opening-day hours designed to accommodate 9-5ers eager to top off their Friday with great sound, and completely renovated rooms that should offer even better acoustics than before, the at-capacity show promises 38 exhibit rooms (including 14 large rooms and one two-room suite), and a combined Marketplace/CanMania with 20 exhibitors total. Put that all together, and you end up with 103 exhibitors and brands combined.