CHENNAI: 'Kalaimamani' Patrayani Sangeetha Rao, who worked as an assistant music director associated with the legendary playback singer Ghantasala Venkateswara Rao, passed away after he contracted Covid-19. He was undergoing treatment in a Chennai hospital and breathed his last on Wednesday night at 9 PM. The talented music composer was 101 years old. Sangeetha Rao was born on