vague question from a beginner

The first thing to do is to pull all signals from your device, and multiplex them to, say, a parallel port of the computer. checking the properties of the signal usng an oscilloscope may help prior to feeding the signal into the computer. You may also interface the signals through a processor like Texas instruments chips etc.

Once you have done that, you may use Matlab real time signal processing tool box to get and store the signal digitally, and process as you wish.

Hope this helps.