Recording of November 1988: Pierre Verany Digital Test CD
A useful test CD has recently come my way, courtesy of the Stereophile editorial staff in Santa Fe (a copy was provided to each of the contributing equipment editors). Digital Test was produced in France by Pierre Verany (PV.788031/788032, 2 CDs), and is distributed in the USA by Harmonia Mundi. It provides a wide variety of tests and useful musical selections, but the subject of special interest here is its test bands for evaluation of laser-tracking and error-correction capability.
There are two interrelated parameters which, in the absence of drop-outs or information gapswe'll get to them shortlycan affect the ability of a player to track the CD "groove" (or "whorl," as the quaintly translated disc booklet calls it): linear "cutting velocity" and track pitch. The standards for the first establish a range of 1.2 to 1.4 meters/second (the rotation speed of the disc varies from 500 to 200rpm from the inside to the outside of the disc to maintain this linear velocity); for the second, the spacing between adjacent tracks, from 1.50 to 1.70 micrometers (µm).
Getting on two years ago, in an effort to identify the best bargains for music lovers on a budget, I wrote a series of columns exploring the field of affordable loudspeakers and CD receivers. I hadn't planned to revisiting that topic so soon, but two developments have convinced me to: first, my encounter with one of the most idiosyncratic budget loudspeakers ever to grace my listening space, and in some ways is a new benchmark for performance vs price, especially for classical-music fans; and second, the advent of a new product category: Affordable Internet-Radio-Capable CD Receivers with Built-in WiFi and USB Connectivity.
Natalie was either impressed by my impeccable taste in music or high on Brussels sprouts: At some point during the meatloaf dinner at my place (see last month's column), with a smile so wicked and dazzling it could knock a stylus from a groove, she asked if I would be the DJ at her next house party.