Samaveda
The Samaveda is the second of the four Vedas and the origin of Indian classical music. Of its roughly 1,875 verses, all but about 75 are drawn from the Rigveda (mostly its ninth book, the Soma hymns), reset to specific musical scales and rhythms for use in Soma rituals. The Samaveda priests (Udgatri) were the singers — their chanting was considered the most refined form of worship. The Chandogya Upanishad, one of the most important Upanishads, comes from the Samaveda tradition. Indian classical music traces its roots directly to Sama chanting.
Hum any note continuously for 60 seconds. Feel the vibration in your chest and skull. That sustained tone is the simplest form of Sama chanting — the Vedic priests believed sound itself was a path to the divine.
Dusk — the traditional time of evening chanting.