Watch the Crazy Triads online guitar lesson by Angus Clark from Hard Rock Survival Guide: Rhythm
Triads against an open string pedal - and the muted gallop rhythm in your right hand! At this point in the exercises we are combining concepts and skills all over the place, so the time spent in the early part of the course should really be paying off for you. This example has two sections, the first uses triads on the 2-3-4 string set against a gallop rhythm on the open A string. The triads are played in a syncopated rhythm and you have to be careful about how long they are held and how you choke them. The duration of the chord is just as important as the attack of the chord. We're outlining A mixolydian here with A (the I chord), G (the bVII chord) and D (the IV chord). In the second section we move to triads on the 1-2-3 string set against the open D pedal. Here we're using the concept of moving a static shape against the open string to create great color chords. Move the D shape up a whole step and you have E major/D, which sounds lydian, move it up another half step to an F major triad, and you have a Dmin7 chord. Move it up another whole step to a G triad and you've got, well, a G chord (with a D in the bass). You'll hear this kind of motion in everything from progessive rock like Rush or Yes, to Sabbath, to Van Halen, to stuff that's on the radio right now. It's a real un-schooled guitarist approach, but the results are amazingly useful. Have fun with it. Also please note that in the D section the pedal notes are in a straight rhythm, not a gallop like on the A section.