CAHOOTSThe Band's fourth album, from 1971, shows the strains which accompanied its recording, and in fact continued to unravel the group over the next five years. Much anticipated upon its release, it can now be appreciated as the fragmented work that it is. Having set impossibly high standards with their previous releases, they were bound to teeter, and they did. But even when falling short of their masterpieces MUSIC FROM BIG PINK and THE BAND, they are