An image of a baby grand piano with a lock on it, so it can't be played. The text on the meme says, "Musicians, proprietary software be like:" then there's an arrow to emphasize the lock on the piano and a frowny emoji underneath. At bottom, it says "Use free software instead."
https://files.mastodon.social/media_attachments/files/112/550/152/945/760/620/original/2dc96640dcc19a9f.png