1500 EUR
To "start" the puzzle, you need to pull down any of the ropes, after which a major-type melody 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 puzzle is solved correctly, the musical effect will work and the next puzzle will be activated or the lock will open.