I found this walk one can download while poking around the Wien.info website, looking for things we should not miss during our week there. There are separate elks for Mozart, Beethoven, Haydn, and others, but this 2-hour walk, starting at St. Stephansdom, covers many:
https://www.wien.info/media/files/in-the-footsteps-of-vienna2019s-famous-musicians.pdf