This sketch turns the Arduino into a datalogger to catch sound calls to an AS-2518-51 sound card (for reverse engineering)
Pin connections for this sketch (on the -51 sound card):
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J1 : pin 8 = hooked to Arduino Pin 2
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J1 : pin 1 = hooked to Arduino Pin 6
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J1 : pin 2 = hooked to Arduino Pin 7
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J1 : pin 3 = hooked to Arduino Pin 8
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J1 : pin 4 = hooked to Arduino Pin 9
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J1 : pin 12 = hooked to Arduino Pin 10
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+5 = Arduino +5
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GND = Arduino GND