Two audio cables from the K3 Line In - Line out to a sound card In/Out. MMTTY on computer. K3 Mode "AFSK-A". VOX "on". Set K3 "pitch" to match MMTTY mark freq.
Some experimentation is necessary to set K3 input/output levels and soundcard output/input levels for proper operation, but that is all you need in the way of software and hardware.
Enjoy.
--- On Wed, 4/21/10,
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