While scanning and listening to recordings, I came across one recording that had an AIR program on Tyagaraja and on what must have been the rest of the cassette, was a recording of Semmangudi. He sings the slokam on navarasam, which he has sung in other concerts as well, but this one almost without an accompaniment (it is possible that K S Narayanswamy is on Veena that can be heard at very low volumes) resulting in one being able to enjoy every nuance is his singing. It is most likely a concert at the Kalki gardens. I have listened two such concerts with M S Subbulakshmi and K S Narayanaswamy, but this one is a different one.

This is perhaps the best of his renderings of the navarasa slokam. Here is the track for your listening.