Tranfter files from one computer to another using only the soundcards (No joke!)

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Than [Thanasis] Zamp

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Published on February 25, 2015 8:08:59 PM ● Video Link: https://www.youtube.com/watch?v=AMmu7zDJMOY

Duration: 11:14

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First, a friendly warning: DON'T WEAR YOUR EARPHONES, USE ONLY YOUR SPEAKERS PLEASE. THIS VIDEO CONTAIN SOUND WHICH CAN DAMAGE YOUR EARS.

Now about th demo:
This is my first demostration in which I show how to transfer a file from a laptop to a PC using only the soundcards at a tranfer rate of almost 5 kbps per channel (5512 kbits per second per channel) since I use stereo. Bits are seperated in both channels using AM (Alltitude Modulation) instead of FM (the last one was used in the Commodore 64 cassettes. A 120 minutes compact cassette btw, may have - in theory - capacity up to 10 MB, unlike the 400 - 500 kB for Commoder 64 cassettes)
The next days, I found a way to double the tranfer rate; the new rate is tHE upper limit of course, unless I'm wrong ;) .