By this time, many are aware of the fact - many kritis of Tyagaraja Svamigal has been changed. The Lost Melodies is involved in collecting, archiving, and presenting the authentic versions.
Here is one such attempt. The old versions resembling each other, indirectly validating Valajapet notations is to be experienced.
https://www.youtube.com/watch?v=q9j6lsQoiNQ