Gregorio Allegri: Miserere, Mei Deus, 1638 (complete 14 minutes). Patrick Husson, 1st soprano, echo choir (in this recording: the high, solo phrase is sung in one breath as a castrato could.) Colmar Boys Choir School, Alsace (with adult males.) W.A. Mozart heard this twice at age 12 at the Vatican and wrote down the work from memory (1769.)