If you can output sound from your computer through your Tascam interface, and you can input midi information from your controller into the computer, then you can play any virtual instrument you like. (Assuming the computer is up to the job)
If you have recorded a midi sequence on you computer, you can send this midi data to the Virtual instrument and send the sound from the Virtual instrument to the output of your computer.
Best way is to download a few trial versions; you will soon get the hang of the basic operation. (Make sure you use ASIO drivers) If you are not sure of anything, then you will find the answer on KVR. (Just do a search)
Hope this helps

Bill