The term supergroup gets a bad rap—but with good reason. Often, it’s applied to a collective of hot-shot all-star musicians who look pretty good together on paper, but the resulting music usually proves the individual parts are actually greater than the sum. Discerning listeners tend to cast a wary eye, er, ear toward such lineup mashups—unless the pedigree is an impeccably progressive one intent on exploring the cosmos of composition to achieve a common sonic goal.