My Morning Jacket is one of the most intriguing rock bands of the 21st century because there is nothing they won’t try. Their unusual mix of acoustic guitars and space grooves, of brass bands and subtly modulating keyboards make them an unclassifiable group. The only way to understand what they do is to hear them firsthand and see what sense it makes to you. Circuital is a much more carefully produced album than their previous catalog. There is still deep reverb from time to time, but it is no longer a catchall technique. “Wonderful (The Way I Feel)” may be the most straightforward piece they’ve recorded, an acoustic ballad with strings that evokes the early 1970s. “Outta My System” crests on a pop groove inspired by the Beach Boys. “Holdin’ On to Black Metal” has a funky kick that’s punctuated with a fuzztone guitar. “First Light” flows with an impressive gait. “You Wanna Freak Out” has a sashaying innocence. “Victory Dance” strips things down in the chorus to where the each note is held out for maximum effect. The iTunes LP includes a video documentary of the making of the album and handwritten lyrics.