Balthasar Wolff am 20. Juli 1498 an Hubmeister Hans Harrasser in Wien:

First, I place myself willingly and cordially at your service, dear Herr Huebmeister. His Roman Royal Majesty, our most gracious Lord, intends to form a band of musicians [capelle] at Vienna and has ordered Herr George N [Slatkonia] to be singing master, Bernhart Meder and Oswalt as basses, also six boys in mutation … to sing descant in the style of Brabant. He has earnestly commanded me to instruct you by virtue of your office as administrator to give the aforementioned singers payment for the coming year, namely 24 Rhenish gulden for the singing master, 16 for Bernhart and Oswalt and 12 for each boy, which comes to a total of 128, moreover [to supply] each and every one with tunic and hose of special cloth and also student caps, as you judge these may be required. Accordingly, as treasurer I command you in the name of His Royal Majesty to pay the wages and attire of the aforementioned singers, as stated above …. This you shall perform as His Royal Majesty commands. Issued at Freiburg im Breisgau on the 20^th day of July, 1498.