Sri T Krishnamachar  A giant in the modern yoga world - his teachings have influenced the practice of all modern forms of yoga. Through the work of his students some of which are listed bellow.
BKS Iyengar Teaches perfection in asana through strict attention to alignment. If each asana is thought of as a note in music then the attention in the "BKS. Iyengar" tradition is to perfect pitch	Sri K Pattabhi Jois Teaches a system where the synergy between and flow of the asana in series is the focus of attention. In the musical analogy Mr Jois' system teaches perfection in playing set tunes.	BNS Iyengar Teaches the same system as Mr Jois . In the musical analogy however Mr Iyengar's approach differs in that he gives scope for improvisation so that the tune may be carried even if all notes are not perfectly played.	TKV Desicachar Teaches viniyoga a system where practices are chosen as appropriate to the student and vary as the student progresses. In terms of the musical analogy this is the full theroy alowing practitioners to develop there own tunes.