Attention: for this cache you have to understand German.
Music is everywhere! If you walk through the park with open ears, you will for sure hear a lot of "natural" music. The Audio-Excursion draws attention to the secrets of the garden. An additional chapter reveals the tasks that need to be solved in order to find and open the cache.
For this cache you need a Smartphone with a QR code reader and speakers or headphones. Two QR codes can be found at the specified coordinates - one starts the Audio-Excursion and the second one explains the associated tasks.
The nearby monastery Marienwerderstraße can look back on a long tradition as a venue for the " Music for walkers ". A look at the events calendar might be worthwhile. You could possibly combine the search for the cache with a visit to one of the free concerts.