I'm looking for software that will do something along the lines of the following. I play a pitch on a keyboard that is connected to my computer via and audio in port. The piece of software takes the pitch and recreates the pitch through a utility like simple synth or garage band or Ableton. Basically I need it to do the job of an Midi keyboard but instead of using the keys of the Midi keyboard to input the notes I use the pitch to input the notes. I have all these great synth plugins for ableton but unfortunately the only way to use them is with the keyboard on my computer (which isn't fun to do). I don't know if something like this exists or what it would be called. I have looked around on the internet for something of the sort but I can't seem to find anything. Or would I just be better off buying a midi keyboard?