Computers play perfectly on the grid. Humans do not.
Services like and LALAL.AI allow you to upload a song (e.g., Ponni Nadhi ) and separate the stems (Vocals, Drums, Bass, Other). You can then convert the Bass stem directly into a MIDI track. While not perfect for complex Raagas, this is the future for DJs and remixers looking for "Tamil songs MIDI files" instantly. tamil songs midi files
Several platforms specialize in providing Tamil film music in MIDI format: Computers play perfectly on the grid