I was given some audio files that are .dcr, which I've never heard of before. Had anyone here ever used a .dcr file, and hopefully knows how the heck I can open it and listen to it? I get an Adobe box popping up when I click on it, but I only have Illustrator, so apparently they want me to buy something else.

You�ve probably already done a search. https://fileinfo.com/extension/dcr