.. Playing the organ

But you are just guessing. You need to make some sense into this.

The organ is quite dark. Maybe you could get more light into it.

Go and light up the lamp post at the alley.

...symbols. Right. Now we need to find what symbols to play.

Have you visited other places? There might be a place under someone with symbols.

The blacksmith, sitting on the stump. Help him.

Nice. Look at the stump he was sitting on. You get clues!

It should be clear now. Go back to play the organ. You can skip the puzzle.

You have to play the corresponding keys from the correct level. Find where are same keys on same level (top, middle or bottom).

Play the following keys: