The Australian and Indian governments are presenting 'Sacred Pathways: Where Ragas Meet Songlines', a cross-cultural concert featuring First Nations didgeridoo artist William Barton, sitar maestro Pandit Shubhendra Rao, and percussionist Nishit Gangani. After performances in New Delhi and Bengaluru, the free, ticketed Chennai show on October 18 opens G'day Namaste celebrations; District app registration is mandatory.