 Maestro Franz Ippich, who fled to Guatemala escaping the Nazis in Vienna, wrote a violin concerto for him encapsulating Wagnerian and Guatemalan Son riffs that Andres interpreted with utmost grace, passion and humor.Maestro Jorje Sarmientos, who would take over the role of conductor after Andres’ departure, also wrote a modern dodecaphonic violin concerto for him.In addition, Andres would strive to introduce new modern pieces to the standard repertoire like, Stravinsky, Prokofiev, Barber, Berg and Dvorak violin concertos.