Yep...although, there's always the cheaper alternative: use an "outdated" DAW interface (like the MOTU 828mkii I use) and some software (like Ableton's CV Tools, MOTU's Volta, etc) that can deal with incoming and outgoing control signals. That way, if you need to gig live, just use the saved voltage info in the track and connect things appropriately. You just have to make 100% sure that the interface in question is DC coupled, otherwise this gets difficult.