He is the first person in recent centuries to unveil and demonstrate the Sarana Chatushtai as originally suggested by Bharata Muni in the Bharata Natya Shastra which is the only way to obtain 22 srutis (notes useful to music) on a musical instrument.
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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.
This assumption though not explicitly stated in the Natya Shastra needs to be made as was discovered by Avinash Balkrishna Patwardhan and is required to prove the Sarana Chatushtai experiment.
Sarana Chatushtai in recent centuries has been demonstrated and proven by Avinash Balkrishna Patwardhan in the year 1998 on flute as well as on sitar (this has also helped him develop a methodology for producing perfectly tuned flutes for different thatas).