I am very interested in this type of art, and I tried the methods listed, but unfortunately, my OS (Windows 10) wouldn't let me open the resulting images. Do you know any way around this?
Unfortunately, that can happen from time to time. First, check to make sure you haven't changed the header of the file in audacity - that's usually the cause of this kind of issue. An easy(ish) way around this is to open the image in Photos and take a screenshot, but you'll probably lose some fidelity this way. If anybody else has other suggestions, please reply!