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Sound for AFX

This is possible by misusing the calc's COM port.

You need no special hardware or controllers for it, what you need is nothing more than a 3.5mm to 2.5mm stereo jack adapter and a headphone. Plug the Phone into the adapter and the adapter into the calc - the COM signal is strong enough that you can hear it.

By writing defined data to the port now we can create every audio frequency we want

I managed to make a sound library for Pascal and C able to play all twelve notes of the scale over five octaves. Two channel mode supported (!!!)

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Copyright (C) 2005 by Marco Kaufmann