Hello!  Harald Mueller speaking of 20-note arrangements, and Ben
Jackson searching for a musical paper weight playing "Over The Waves"
-- the first theme of this famous waltz must pose the worst-ever
challenge to the arranger of lesser-keyed instruments!

If anyone wants to try it out, the 20-note scale is:

G, C, D, e, f, f-sharp, g, a, b, c, d, e, f, f-sharp, g, a, b, c, d, e.

Best regards
Christofer Noering
Stockholm