The Mahler cycle was the first project in the more than 20-year-long association between Leonard Bernstein and Unitel. The leading Mahler interpreter of our time, Bernstein recorded all of Mahler's symphonies between 1971 and 1985, chiefly with the Vienna Philharmonic, producing a unique musical document and triggering a major reappreciation of Mahler's works. "All Mahler symphonies, all Mahler works for that matter, deal in extremes, extremes of dynamic, of tempo, of emotional meaning. When it is bare, it's extremely bare, when it is thick and rich, it's thicker and richer than anything in Gotterdammerung, and when it is suffering it suffers to a point that no music has ever suffered before" (Leonard Bernstein).