I've been writing lyrics for a number of years and found a company in Nashville that will make a demo for a very reasonable price. They will take your melody or you can let them decide what the melody will be. They do single instrument, or 5, or 7 piece band.  These are in MP3 format so just click on them and your media player should play them. The first two are single instrument, and the rest are 5 piece band. Have one Gospel, and one Christmas song.