[TMSZ] has a better option, a ~1 dollar USB sound card which is easily hacked to work as a simple oscilloscope. Easily found on eBay, the 7.1 virtual channel sound card is identical in brains to a ...
【USB Sound Card】- External stereo sound card connects ... 3.5mm jack compatible with any system including Windows 10/8.1/8/7/Vista/XP, Mac OS X, PS4, Linux, and Google Chromebook, Windows ...