Inverting the string quartet from two violins, viola and cello to two cellos and one violin and viola, "Invert" is, first, a must for Kronos Quartet followers and second, required listening for the forging of contemporary classical string repertoire. In an album composed by its members, "Between The Seconds" takes the listener from driving, ostinato themes that excitedly crescendo with exponential energy to fully expansive and outward-reaching, atmospheric material to imaginative incorporation of world music elements and pop fusion.