This is the most popular source for mobile-ready clips. You can find various snippets of the haunting title music and the specific "Vidathu Karuppu" horse-trot BGM on Zedge's Marma Desam Ringtones Vision Time Tamil (Official Source): The official production house, Vision Time Tamil
Several creators have uploaded "HQ Remastered" versions of the background score. You can listen to the Marmadesam Theme (HQ) to ensure it's the specific "Deep Piece" track you are looking for. marmadesam ringtone high quality
: By integrating traditional sounds with a thriller-style pace, the music grounded the supernatural elements in the "real-life traditions of Tamil Nadu". This is the most popular source for mobile-ready clips
The rain-falling-upwards, the brass-thrum, the backwards whisper—all of it, compressed, imperfect, but there —erupted from his phone’s tiny speaker. : By integrating traditional sounds with a thriller-style
The classic suspenseful tune associated with the overarching series title.