That stuff is just linear improvisation. I was probably playing So What before most people here were born. It's very simple music, and should be just one weapon in your arsenal. You players need major, natural minor, harmonic minor, melodic minor, and diminished runs. You need pentatonic scales and diatonic modes. You need to spell chords vertically. Modal jazz is kind of a cool jam, and I still play it, but don't miss the big picture. Don't go on that website and order all those books thinking that you will be the next Coltrane. You can know twenty words that rhyme with moon, but can you put them in a poem? The only way that you are going to play any genre is to do it. When I first took up bamboo flute in asia there were no books, but I listened and mimicked the modes and scales. Modes are just a small part of the big picture. I certainly wouldn't stop playing rock because I learned the diatonic modes :) What I'm trying to say is, don't get hoodwinked by these shake and bake websites. :) Tear it up!!!! Terry