He started his research on Indian classical music in the 1990s which led to his work on the Sarana Chatushtai and later he also evolved a methodology to develop perfectly tuned flutes.
Avinash Balkrishna Patwardhan's research on Indian classical music led to the successful demonstration of the Sarana Chatushtai in the year 1998.
His work has been acknowledged by music experts and he has also presented a paper on the same at ITC Sangeet Research Academy, Calcutta, India at the National Symposium on Acoustics (1998).
This demonstration proves incorrect, the assumption by Pandit Vishnu Narayan Bhatkhande, who has criticized the concept of existence of srutis itself in his book Bhartiya Sangita Paddhati [Vol 2] (written in the late 18th or early 19th century).
Avinash Balkrishna Patwardhan later also evolved a methodology to develop perfectly tuned flutes for ten thatas in the present Indian classical music using both bamboo and PVC material.