This short impression of our making of shows Uwe Wolf and Frieder Bernius while working together at the Missa in c! Great insights into their interaction at the new edition and recording! The Missa in c is a fascinating work. But to speak of “the” Mass is inaccurate, for basically it is no more than a musical fragment, full of enigmas and problems, yet full of magnificent music. Attempts have been made to create a performable version of Mozart’s fragment since the 19th century. Now Frieder Bernius and Uwe Wolf have published a new edition of the Mozart mass which attempts to produce a performing version whilst maintaining the greatest respect for the available material, and without obscuring Mozart’s musical manuscript with their own contributions. With his Stuttgart Chamber Choir Frieder Bernius recorded this version on CD for Carus.