[I don't understand this fixation on all these other "progressive" bands who use the guitars as primative rhythm instruments while keyboards dance over them. I'm pretty amazed that everyone really craves that sort of thing.]
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So, are you saying that guitarists like Jon Petrucci, Michael Romeo, Stephan Forte, Andre Olbrich, Luca Turilli, Thomas Youngblood, Kiko Loureiro, etc., use the guitar as a primitive rhythm instrument???!!! What have you been smoking?!
If there ever was a primitive rhythm instrument in metal, it would probably be the rapid double base drum which defines the sounds of Gamma Ray, Helloween, and all their copy cat bands. These bands use it to excess which makes most all of their songs sound the same to me IMO. I'm pretty amazed that everyone really craves THAT sort of thing.