The cache area can be reached by public transport (U1/U4 Karlsplatz). Driving by car is not recommended. Stage 1 and 2 are not always accessible! But you don't need a ticket to get the information you need.
Stage 1:
N1 48°12.036
E1 016°22.343
He lived in the 18th century and was an important reformer of the opera. How was his 2nd first name?
Take the 6th, 7th and 9th letter and convert them into digits (A=1, ..., Z=26). The sum is A.
Stage 2:
N2 = N + A
E2 = E + (40*A+4)
He lived most of his life in the 20th century and was a main member of the Vienna School. His compositions include “Verklärte Nacht”, “Pelleas und Melisande” and “Moses und Aron”.
Take the first letter of his surname and convert it into a number to get B.
Stage 3:
N3 = N2 + (11*B+13)
E3 = E2 + (9*B-15)
He lived in the 19th century and was the Linz cathedral organist and organist of the emperor in Vienna. He wrote 9 symphonies, with the last one unfinished. You will find a statue/bust.
Take the last letter of the whole text and convert this one into a number for C.
Cache:
NC = N3 - A-B-C-13
EC = E3 - A*C-B-C
Good luck
Team luchsp