Answer: In the faded castle, just choose the pattern on the wall and solve the puzzle.
1. First open the map and go to the faded castle. After arriving at the location in the picture below, unlock the task and take down the blank sheet of music.
2. Then find the nearby musical instrument as shown below, and activate the icon at the bottom according to the pattern prompts on the wall.
3. Then come to the opposite side and use the same method. According to the icon on the wall, activate the device in the second row.
4. After successful activation, you can activate the device and get an exquisite treasure box.
5. Finally, we approach the central position and select Remove to complete the removal of the blank sheet music and complete the task.
The above is all about how to complete the task of removing the blank music score in "Genshin Impact" 4.6. For more game guides, please click on the source code website.