What is "growl"? Can somebody break it down into a frequency or audio texture based description? I've played jazz basses, p-basses, various basses of all manner. I know what they sound like, but I don't have a clue on what "growl" is? I have a G&L Tribute JB-2. If anyone can tell me how to dial in a "growl" on this thing, going through a Mini Mark II, I would really appreciate it. Just so I can know what you are all talking about.