Great lesson, dude! +1 to your karma ;)
Exotic Scales or Modes are a great way to incorporate some very necessary spice into your riffs. In this case, we begin our Modal conquest by looking at a Japanese Scale called the Hirajoshi scale. Technically we will be playing a ‘mode’ of this scale. Our scale forumla is 1 b2 4 5 b6. This b2 or minor second is the distinguishing note with this mode and gives it a lot personality. For an example, we will be looking at the opening riff of my song 1916. This riff borrows from the Minor Pentatonic scale, as well as the Phrygian Mode. Both scales are integral tools in the Creation of badass riffage. Take your time and really absorb the color and personality of these modes so you can exploit and expand your modal usage.