While decidedly "niche products," as Martin Colloms describes them, single-ended (SE) tube amplifiers have still found a happy home in many audiophile systems. But a trap awaits those who wish to evaluate the differences between an SE and a solid-state or push-pull tube amplifier, or between two SE amps. In "<A HREF="http://www.stereophile.com//features/127/">The Unseen Variable</A>," Colloms digs to the bottom of this complicated matter.

The Secure Digital Music Initiative (<A HREF="http://sdmi.org/">SDMI</A&gt;) appears to be the antidote to many a record executive's worst audio poison: legions of young music fans downloading digital audio files off the Internet and passing them around with no regard to copyright restrictions. But what might be the answer to some companies' prayers could prove to be the Big Brother nightmare feared by others.

Last week, <A HREF="http://www.semiconductors.com/">Philips Semiconductors</A> announced the CD10 chipset, which the company describes as the world's first two-chip solution to deliver CD-RW (compact disc, re-writeable) compatibility for CD audio players. According to Philips, one chip provides a data amplifier and laser supply circuit, while the other is the digital servo, decoder, and DAC. As a result, Philips claims that the new chipset allows designers to build audio players that can read all forms of CDs without an increase in component count.

Last week, satellite-to-car radio broadcaster <A HREF="http://www.cdradio.com/">CD Radio</A> announced an agreement with mobile electronics manufacturer <A HREF="http://www.alpine1.com/">Alpine Electronics</A> for the design and development of satellite radio receivers. Under the terms of the agreement, Alpine says it will design and develop three-band (AM/FM/CD Radio) audio receivers for installation by car manufacturers. The company also plans to design and develop satellite radio receivers for sale directly to consumers in the electronics aftermarket.

Internet music retailer <A HREF="http://www.cdnow.com/">CDnow</A&gt; has formed a partnership with <A HREF="http://www.sony.com/">Sony Corporation</A> and <A HREF="http://www.timewarner.com/">Time Warner</A> to build a music and video retailing behemoth. The July 13 announcement came in the wake of online bookseller <A HREF="http://www.amazon.com/">Amazon.com</A>'s recent move into the music market. With the backing of corporate giants Sony and Time Warner, CDnow could be able to mount a challenge to the growing presence of Amazon, which is also expanding into toy sales and consumer electronics.

After months of wrangling, the <A HREF="http://www.sdmi.org/">Secure Digital Music Initiative</A> (SDMI) has announced its first set of standards for portable digital music devices. Manufacturers can now incorporate these standards into the designs of new products. Many industry observers believe that portables will be the next big wave in consumer audio, expected to hit the market by the winter holiday season.

Winter had just touched down in Santa Fe two days before the recording sessions were to begin, leading Wes Phillips to wonder if the damp air would wreak havoc with tuning. But he needn't have worried, writing that violinist Ida Levin "played with such intense concentration that sometimes she seemed about to levitate off the floor as she chased a melodic line into the ether." In <A HREF="http://www.stereophile.com//features/125/"><I>Duet</I>: And Two to Carry Your Soul Away</A>, Ida Levin and John Atkinson join Wes Phillips in chronicling the recording from both musical and technical perspectives.

John Atkinson's and my collective response was "Good grief!" on hearing that the UK's <A HREF="http://www.haymarketgroup.co.uk/">Haymarket Magazines</A> had purchased <A HREF="http://www.gramophone.co.uk/">Gramophone Publications</A>. Minds boggled at the very idea of the venerable old lady of classical-music criticism getting into bed with the much younger, altogether brasher, and unashamedly populist <I>What Hi-Fi?</I>, market leader among UK hi-fi mags. As Haymarket enigmatically put it, "With its emphasis on in-depth reviewing, <I>Gramophone</I> itself has great synergy with other titles in the Haymarket portfolio, such as <A HREF="http://www.whathifi.com/"><I>What Hi-Fi?</I></A> magazine."