Ok to answer my own wondering, I finally went and looked up harp equipment. There are special effects mics,and this thing called Pod 2.0. It's a recording amp that gives you 16 effects and just a small box that goes through the pa system. Like I said I noticed this when I watch some players pushing buttons and then I noticed the different sounds that were made. None the less you still need to be a good harp player, it's not like these things play for you!