Johann Michael Haydn's oeuvre includes more than thirty works in Latin or German for two or three descants, composed for his "dear choirboys" of the Salzburg ‘Kapellhaus'. The first setting of the ordinary in this series was the Missa Sancti Aloysii, composed in 1777. It was initially intended for the Commemoration of the Holy Innocents on 28 December, when the chapel boys celebrated their principal feast day. This exceptionally charming mass, characterized by a wonderfully effervescent joyfulness, is an insider's tip for anyone looking for new repertoire for three-part women's, girls' or boys' choir. By virtue of ist scoring, the mass is also eminently suitable for small-scale performances.