How do your teachers learn you to improvise (gat vistar)? Do they teach you a systematic aproach like Ravi Shankar's layakari system (division of the matra)? I mean that you first learn to improvise tanas from one note in one matra, then two notes in one matra, then 3,4,5,6,7,8 and 9. Or do your teachers teach you a different method of improvisation?. I am curious.