The PT-iTrust cards are all TTL when using DMX control or auto/sound unless something changed recently. They will pass analog through so there's no stopping you from getting a DAC and software and using that.
As owner of six of these cards from long ago, the DMX or auto controls are VERY limited and almost assured to disappoint. The patterns are run at approximately 12k and don't look very good. I would take that same money and put it toward a quality DAC and software.
David
"Help, help, I'm being repressed!"