From The Beatles and Ravi Shankar, to John McLaughlin’s Mahavishnu Orchestra, to Mickey Hart’s collaborations with Zakir Hussain, South Asian classical music has long influenced western musicians. In recent times, the reverse is also true, what with hip-hop loops underpinning the latest bhangra and Bollywood grooves. But this West to East influence was less prevalent in the mid-60s, especially in the more traditional parts of South India, where a young Kadri Gopalnath had a…