In its original 1973 manifestation, the Who’s Quadrophenia evidenced serious problems as well as considerable assets. The good news here is that the rock “opera” has been not only resurrected but also skillfully revamped for the group’s current film. Though most of the original set’s material has been retained on the new double LP, a remix by John Entwhistle renders the bass sound fuller and adds life to Roger Daltry’s vocals. In addition, the soundtrack offers the clever “Joker James” and two other tunes that Pete Townshend composed for, but ultimately omitted from, the previous collection. Other welcome additions include the vintage “Zoot Suit,” the first song ever released by the Who, and a full side of 60s classics by acts like the Ronettes and the Kingsmen.