Sierra Maestra are Cuba’s great survivors. They started out back in the mid-1970s, then a group of engineering students at Havana University who decided to form a band reviving Cuba’s classic son styles, and since then they have just kept going, mixing old material with new songs in the son tradition, with a dash of up-tempo big band guaracha or Afro-Cuban jazz thrown in. There have been changes in personnel over the years but five of the other original musicians are still in place, including percussionist Luis Barzaga, now one of the three lead singers. The band still uses the classic son line-up of tres, trumpet, bass and percussion, and the songs are as varied as ever.