Watch the Drop D Bullet online guitar lesson by Angus Clark from Hard Rock Survival Guide: Rhythm
This example is in drop D and the amp setting has more gain so when you mute the low strings you get a real ballooning in the low end. Great fun. But with high gain and fast tempos comes great responsibility. This example is at a really challenging tempo, but that's where the money is with this style of play, so you'd better take a stab at it! From a compositional standpoint, the riffs for this kind of stuff, similar to the "Nu Metal Ostinato" example, are really simple chord changes with some moving notes between and on top of the chords to create more motion and melodic content in the rhythm part. The easiest and most elegant parts are executed against the open strings. It's obvious that I created the part over the D string. Then we move to the G chord and moving thirds and power chords over the bass note become considerably more difficult. So, instead of moving thirds and power chords, I just move the single note on the D string in order to maintain some motivic continuity. At this point in the course, the right hand technique is getting pretty intense. Don't get crazed by it. You have to build up to these things, and you have to practice everything slowly. That's just how it goes. The course would not be complete without addressing this style of rhythm playing. Ever since Metallica had their time at the top, the super fast muted 32nd note is an acceptable production choice in pop music, just like rapping (a joke). Keep your pick attack clean, without a lot of slicing against the string. And you don't have to pick too hard for this kind of stuff. As a matter of fact, a lighter attack is actually better when you start tuning down. A hard attack can make the string wobble out of tune.