I got MMTTY working on split. too easy go to
OPTIONS: Setup MMTTY : Sound card: I have two slices open slice one had DAX 1 for receive and DAX two had slice two for Transmit, side note I was watching Acts of Valor on the other screen and had to turn it off or there was a delay of 1 or 2 secs. IMPORTANT open up the DAX control panel and make sure DAX 2 is TX ready.
have fun on RTTY 73's de Jim