In reply to aln:
I really enjoyed it - it was interesting for the background on the design school that was the base for these experiments, and the overall Indian cultural context. The interview with the last surviving student was really good too, although rather sad in that he never got to pursue his interests in electronic music.
I could have done with a bit more from the original tapes but they were still intriguing.
It's still available on iPlayer-
https://www.bbc.co.uk/sounds/play/m000j969