This tutorial creates an Eigenharp Pico configuration from scratch in Workbench so that you can play your analog synthesizer over Control Voltage. This requires EigenD 2 and a DC-coupled audio interface or a similar solution like the Expert Sleepers ES-3.
I'm using the Expert Sleepers Silent Way plugin to generate calibrated pitch voltages, but all the principles should apply to MOTU Volta also.
The Pro version of EigenD 2 is required to use Workbench, but it's possible to achieve CV control by modify an existing factory setup using Belcanto and the non Pro version of EigenD.
http://www.youtube.com/watch?v=6-TaZZJk_ok