There are several soprano saxophone's in Brandsma's collection.
- Straight soprano, silver plated 1929 Conn, serial # 224913. Extra long model.
- Curved soprano, Prologue, serial # 2746
- C soprano, Conn. (Yes, a soprano tuned to the key of C concert pitch) Serial # 84319
Bert Brandsma played soprano sax as soloist fronting KMKJWF.
One year, in the Cologne Opera House, the ouverture required a few bars of soprano. It can actually be heard on one of the DVD's, made from the WDR broadcast.