You might find it hard to believe but spirits are actually as easily recorded as you might record yourself singing your favorite song. All you need is a tape recorder and a blank tape and your set. The only problem is where and when you press the record button.
You can either record at random, which might cost you some time, or pick a certain place where you feel a spirit is normally present. Take key, that spirits, when recorded, are most likely to speak very quietly and you might want to enhance your recording with a common computer program such as 'sound recorder', or 'sound forge'.
When trying to communicate on tape, it works best to use a blank cassette tape due to the known fact that the magnetic process of recording picks up spirits and that you don't want anything else previously recorded interfering with your conversation.
This will only work if a spirit is present and if he/she feels like talking. Spirits will normally keep quiet, so don't expect guaranteed results even when recording in haunted areas.
good luck...
If you come up with anything, let us know...