1200 EUR
To "launch" the puzzle, you need to pull down any of the ropes, after which a minor melody in the style of a children's fairy tale will start playing from the common speakers. When there is silence, you can start the task, namely repeating the melody exactly as it sounded at the demonstration stage.
Now each rope will play a separate fragment of the melody, which are quite similar, so this task is for those with advanced musical abilities.
If the riddle is solved, a musical and light effect will work and the cache will open or the next riddle will be activated.