LATEST ADDITIONS

This issue contains a report on a truly ingenious little device called the ABX Comparator, which takes the fraud out of subjective testing. It does this by making its own selection of source A or source B for each listening trial, without telling you which was selected. Only after all the tests will it reveal what you were listening to each time. "Score" sheets are provided so you can list your guesses, compare them with the cold, uncompromising truth, and file the results for posterity. Or better still, for the first hard evidence that has ever been presented that a lot of people can hear differences that cannot as yet be measured.

The sound, of course, but here's a checklist of 16 specifics to consider when evaluating your own or somebody else's live-recording efforts.

101 years ago, the tinfoil cylinder started it all. Within 22 years, its heyday was done, and public support swung to favor the then-new wax-mastered disc. 1948 saw the switch to a slower speed and a finer groove, but the flat disc, traced by a stylus, has held sway for almost 80 years now. Even today, people with multi-speed turntables and a couple of arms (or plug-in cartridges) can reproduce from a single phono unit the earliest or the latest discs merely by the flip of two switches (for speed change and cartridge change). All that is about to come to an end.