Covox or “sound card for LPT-port” - history and practice

Despite the fact that Covox is quite easy to assemble at home , not many will do it. Yes, and it would seem, how good can make an improvised device on a scattering of resistors? I personally thought that it would be only a little better than the sound of a PC-speaker . But how wrong I was!

In the video there will be a story about the history of this piece of iron, a little about its structure and principle of operation, as well as listening to music from various toys with the help of this piece of iron. Enjoy watching!