Personal motivation: I wanted to search for Burgmüller but there is no way to make it work. In that case there is a workaround by browsing through the composer list. But the issue also applies to searching for étude or "für elise".

** I have a small code change that corrects this, but in order to make a pull request I need for this project to have a clearly indicated license, which I don't see. That's not for me, but for my employer, who allows me to submit patches like this easily with many licenses.

If you'd rather just make the change yourself:

• Input from the URL needs to be decoded from UTF-8, as with https://perldoc.perl.org/Encode.html
• Uppercasing of the search terms should use uc() or some other approach that handles more than ASCII characters.