Won't the Windows sound recorder do at a pinch? You may need to create a longer blank file as 60 seconds recording isn't enough! Once you have one and save it you can use it any time and save-as under the name of your tune.
Setting properties (File dropdown // format conversion // recording formats) to about 20,050kHz 8 bit stereo is quite good but you can set it more hi-fi if you need it. I think you can set it to MP3 if you don't like PCM which is just a way of digitally coding audio without compression.