To casual music fans, Boz Scaggs is that smooth dude from the ’70s with those disco-ey hits “Lowdown” and “Lido Shuffle.” They might even know about his 1976 smash album Silk Degrees, which included those tunes as well as “Georgia,” “What Can I Say” and “Harbor Lights.”

Although Scaggs’ days as a major hitmaker ended in the early 1980s — in large part because he took a self-imposed hiatus for most of the decade — he has made estimable music in the 1990s and, especially, this decade. And he’s done so by turning to a familiar riff for recovering rock stars: singing old standards.

That news might cause eyes to roll — especially if you think Rod Stewart — but it would absolutely not apply in the case of Boz Scaggs. His But Beautiful (2003) and last year’s Speak Low are among the best examples of a veteran pop star delving into such old chestnuts as “What’s New?” “Sophisticated Lady,” “Easy Living,” “I’ll Remember April” and “Speak Low.”

He sings the material in a supple, torchy style, burrowing into the lyrics, caressing phrases with his round, throaty tenor. Scaggs has a natural knack for seducing you into these literate, urbane numbers culled from the legendary writers of the American Songbook.

This article appears in Jun 17-23, 2009.