I don't see an answer yet from anyone, so I will give you at least a high-level answer,
since I personally am not a digi mode guy and haven't tried it out yet myself.
The basic answer is YES. All you need to do is to hook-up the control RRC MIC and speaker
to your PC. This obviously will only work well if the quality of the audio is solid and latency is
good, which it usually is. I have heard about some people having connection and PTT problems,
but got around it by just using an interface with cables on the control RRC, such as the Signalink.
To send RTTY, you may use the virtual FSK COM port that is now implemented. See the manual
for details.
73,
Mitch DJ0QN / K7DX