Did you ever wish you could record a sound on your computer, but didn't have a microphone? Well, provided that you have headphones, your woes may not be over entirely, but they have lessened! A while ago, I got to thinking that if sound waves impacted upon a speaker, some electricity would be produced. It turns out that on analouge (read: normal,) headphones, the signal that most computers read as input and the signal produced by speaking or otherwise making noise near them is compatible. This means that you can plug a set of headphones into your microphone jack and use them to record sound. Be cautioned, however, that I have only tried this on 3 pairs of headphones and the resulting sound quality ranged from barely acceptable to shit and you have to talk really close to the headphone. I seemed to get the best results with those tiny "earbud" ones.