aisar190, you didn't say how you recorded it.
If you used an ordinary tape recorder, then you need to digitize it into your computer. If you are using Windows, then try the Windows Sound Recorder accessory, or MATLAB's wavrecord function.
If you recorded it on your computer, then it is already sampled, so you can simply use something like MATLAB's wavread or auread functions as vadkudr suggested.
If you recorded it on a digital camcorder, then there are other ways to import the sound data.