text: Viola, chord tones! Music! So for scalar runs in 4/4 time in improvisational context, 8 note octatonic and 6 note hexatonic scales are more musically useful than the 7 note diatonic and 5 note pentatonics we are told to memorize and play by rote. 
  
  “Play chord tones on strong beats” is the rule. 4/