Now there is a mathmatical formula to figure it out. Special thanks to the good people at Way of Life for helping to develop this formula. What you do is take the number of people in a band and determine what percentage of them make up the rhythm section, then you determine if that number is 4% or less like in an orchestra or an organ by itself. This would be considered appropriate worship music. On the other hand, if it is say 75% like most ROCK bands, then it would be sensual and demonic, or evil. This should clear things up for those of you trying to unravel this mystery in your churches.
Hope this makes things a little easier.