Ricky Skaggs and The Whites turn up as guests on Lee and Elaine Roy’s bluegrass-y debut, Lonesome Whistle (Rural Rhythm), and that makes sense: Not only did Skaggs’ fiddler, Andy Leftwich, co-produce the album, but the brother and sister claim Skaggs as a major influence — not so much for his current bluegrass, it appears, but rather for the smooth, sophisticated blend of ’grass and country he rode to fame in the ’80s. The Roys aren’t afraid of a banjo — arguably the basic bluegrass signifier — and their sound here is wholly acoustic, but their singing, songwriting and arrangements bear the unmistakable stamp of Music Row in that same era. Purists may mutter darkly about carpetbaggers and crossovers. But it’s results that count, and The Roys are more than talented enough to have found an enjoyable seam. They may not dig deep into the dark side, but what they are doing, they’re doing well.