This is the morning session of the Sangwa duiba ritual which is performed by around 140 monks who attend the service.The senior monks and musicians are seated on both sides of the main aisle, facing each other. The conch trumpet called 'dung-khar' is meant to symbolise the 'om' sound is played. This Tantric ritual is performed for the goddess Sangwa duiba on the 15th day of the Tibetan calendar where the Sangdui text is recited.