This Guinean group has a backstory similar to that of Senegal’s Orchestra Baobab: both bands are decades old, and at one point were state sponsored; both were moribund when a record producer spurred them back into action.  (In Bembeya’s case it was Christian Mousset, who runs the Marabi label in France.)  On Bembeya, released stateside last year on World Village, melismatic Mande melodies unfurl over swaying Afro-Cuban polyrhythms, and the multiple guitars and precise brass section deliver a sound that’s at once elastic and drum-tight, stuffed with plush harmonies.  Lead guitarist Sekou “Diamond Fingers” Diabate, a founding member of Bembeya, has just put out a solo disc featuring the band’s rhythm section: Guitar Fo (World Village) uses the same sort of percolating grooves, right down to the occasional touch of reggae syncopation, but here the focus is on Diabate’s propulsive guitar work – liquid and bubbly on electric, mesmerizing and eerie on steel.  As good as the records are, though, they can’t match the raw energy this hard-touring band creates onstage.