If you have a library full of these unreadable files, you don't have to rename them manually. There are tools designed to "translate" the gibberish back into its original form:
For bulk fixes, tools like SoftOrbits MP3 Downloader or command-line utilities like convmv can help restore the correct encoding to your file system. If you have a library full of these
You can copy-paste the text into an Online Mojibake Fixer to see what the song is actually called before you even open it. If you have a library full of these