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Transmission data through soundcard

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hivongxanh_dt7

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i have to a project to tranfer data between PCs using sound card. Require data is modulate FSK or PSK or HDB3 ... to packet. This is my exercise for data communication and transmission.
Please help me ? using PIC or PC, soft by delphi
Have you some idea?
 

Ok! now i has finished project transmit successful through soundcard. My data is modulate with PSK31(BPSK,QPSK). I referenced file PSK.dll on webhttps://www.qsl.net/ae4jy/index.htm
my program is written with borland delphi7.0 base on PSK31.dll
i tested them and it run good.
I want to share with you!!!
have Fun!!!:D
 

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