Norrington started his career singing tenor . In 1962 he formed the SchÃ 1\/4 tz Choir ( later the SchÃ 1\/4 tz Choir of London ) . Norrington worked as a tenor through the 1960s , and in 1962 founded the SchÃ 1\/4 tz Choir ( later the SchÃ 1\/4 tz Choir of London ) .