As much as I delight in pagan dreams of sweetly perfumed garden nymphs, I'm embarrassed to admit that my mind also drifts in pleasant reveries whenever I hear the words research and development in the same sentence. I am by nature a greasy gearhead. The idea of taking well-considered steps of engineering to analyze and possibly improve the operation of any electrical or mechanical system never fails to get my imaginative juices flowing. This is why I've spent decades fascinated by perfectionist audio: I like watching and participating in its edgy, eccentric evolution.

E.S.P., recorded over three sessions in January 1965, marked a major turning point in the music of Miles Davis...Mobile Fidelity's 45rpm two-disc vinyl reissue—mastered from the original ¼-inch, 15ips, two-track tapes by Krieg Wunderlich—captures the sound's bloom and detail with more warmth and detail than any previous pressing, including Columbia's original.

Twenty-four years after The Hilliard Ensemble and saxophonist Jan Garbarek recorded Officium, the first of their three haunting, century-crossing collaborations for ECM New Series, Trio Mediaeval has done something similar with trumpeter Arve Henriksen. On their latest ECM New Series album, Rímur, the vocal trio of Anna Maria Friman, Linn Andrea Fugiseth, and Berit Opheim teams up with Henriksen to produce timeless versions of chants, hymns, folk songs and improvisations based on Icelandic, Norwegian and Swedish sources from earlier times.

If, like me, you're a dues-paying audiophile who's circumnavigated the upgrade block a few times, you've seen a lot of gear and set up many systems. I've carried 80-lb line conditioners up the six knee-crunching flights to my bachelor's penthouse, managed 50-lb loudspeakers downstairs to a waiting van, and made more trips to FedEx than I can count. I've owned dozens of audio products and reviewed dozens more.