Career
Before his voice broke, he sang in the same Viennese choir as Michael Haydn and Johann Georg Albrechtsberger, composers with whom he later in life traded manuscripts. In view of this circulation, it is not surprising that some of his music has been incorrectly attributed to Haydn. However, his Missa Profana, satirizing the stuttering and bad singing of a schoolmaster, was once attributed to Wolfgang Amadeus Mozart.
Aumann was ordained a priest in the Augustinian Order in Saint Florian in 1757, essentially staying there for the rest of his life.
He said Mass occasionally, but wrote lots of mass settings. Aumann"s music was a large part of the repertoire at Saint Florian in the 19th century, and Anton Bruckner availed himself of this resource for his studies of counterpoint.
Bruckner focused a lot of his attention on Aumann"s Christmas responsories and an Avenue Maria in Doctorate major. Aumann"s oeuvre also includes instrumental music, such as some of the earliest string quintets.