Many companies in high-end audio and elsewhere use a trickle-down approach to advance their products. The process begins with the development of a suite of new technologies, capabilities, components, or whatever the relevant entities might be. Typically, it's a flagship product that functions as the impetus, target, and first deployment of the new technologies. Subsequently, the new technologies trickle down to other models, each one incorporating a subset appropriate to its price point.

I was planning one of my occasional long drives, for music and photography. I had scheduled two nights in Nashville, so I asked around: Where should I go for live music after a dinner of Hattie B's hot chicken? Art Dudley recommended the Station Inn, perhaps the world's best venue for live bluegrass music. You can read about my experience there in the November 2019 Stereophile. The Station Inn has now added a streaming service. For $8.99/month or $99/year, you get between 10 and 20 live-streamed performances every month plus access to the archives. If you're a bluegrass fan or merely bluegrass-curious, I encourage you to check it out. It's not as good as being there, but it's still good.

When I studied physics at university too many years ago to admit, I learned about Occam's razor. Many, many more years ago than that, Franciscan friar William of Occam stated that a hypothesis should provide the simplest possible explanation for a phenomenon.

Black Sabbath: Paranoid Super Deluxe
Rhino/Warner Records R1 556692 (5 LPs). 1970/2020. Rodger Bain, original prod.; Hugh Gilmour, reissue prod.; Barry Grint, LP mastering eng.
Performance *****
Sonics ***

The reviewer venturing to identify the birth bed of heavy metal music risks wrath. So be it.

The heavy metal genre has many roots. The idea of power chords and music centered on ominous, mythological, and vaguely threatening lyrics goes back centuries; consider the use of European church music in various eras to literally scare the hell out of believers. But heavy metal as we know it started 50 years ago with Black Sabbath's Paranoid.

When Stereophile publishes a followup review in the print magazine, we add it as a "child page" to the website reprint of the original coverage. We have recently done so with three significant products: the Magico M2 loudspeaker, the Linear Tube Audio Z10e tubed headphone amplifier/integrated amplifier, and the Okto Research dac8 PRO multichannel D/A processor.