There are eight music sheets to be found in Stray. Check out this guide to find out Where To Find The Sheet Music In Stray. This way you can help out your robot friend and also complete the quest.
Where To Find The Sheet Music In Stray
Sheet Music 6 is super close to this so I recommend skipping to that one next.
Inside that window you will find it on a shelf in the room. You can also go through the door in the back for a little extra stuff.
Check back soon for more Stray guides.