If you specifically want the on your phone/PC for free, the legal options are limited. However, here is a workaround:
Most Indian music apps have a "Free" tier where you can listen to any song with ads. adi ennadi panthadum papakale song free
Before I proceed, I need to clarify a few things: If you specifically want the on your phone/PC
This is the most reliable source for old Tamil classics. the legal options are limited. However