[Elecraft] K3S data modes

[Juliean Galak]

Wanted to check my understanding of one other thing:  

Doing data modes, especially RTTY, PSK31, and JT65, doesn't require any special connections between pc and radio, right?  No mic to headphone wires or USB sound cards?  It's all handled by the codec over the USB connection?

What about computer-generated and decoded CW?  Can that also be handled by the codec?

Thanks,
Juliean
KD2JPF