I used my mother's radio as a PA system. I'd take the telephone, the speaking part, and take those two leads off and lead them into the radio and the sound would come out of the speaker.
Paint pictures with sound. First, find your white-the deepest, roundest sound you can play on the guitar. Then, find your black-which is the most extreme tonal difference from white you can play. Now, just pick the note where you've got white, pick it where you've got black, and then find all those colors in between. Get those colors down, and you'll be able to express almost any emotion on the guitar.?
If you're in the U.S. and talk to someone on the phone who's in Iraq, you'll experience sound delay. It isn't long, but the sound has to go to a satellite and back, it's used for everything. I'm proud to have that be something I invented.