Jazz/classical crossover specialists Turtle Island Quartet salute jazz master John Coltrane performing their Grammy-winning album “A Love Supreme: The Legacy of John Coltrane”.   Recorded four decades ago at a time when the country was deeply troubled by issues of race and war, Coltrane’s music was a personal statement of redemption and salvation that struck a chord in the hearts of millions. In exploring John Coltrane’s musical legacy, the Turtle Island Quartet continues its own tradition of employing the string quartet form to shed new light on the timeless joy and beauty contained in the greatest music of the American jazz masters.