sentences:  Sāmagāna is not merely a name given to singing hymns of Veda but represents the philosophy and science of uniting thought, sound and music.Sāmagāna is purpose of creation of Samaveda.Sāma is singing of hymns from Rigveda alone and not from other Veda-s. "richi adhyoodham sama" ऋचि अध्यूढ्रम साम (Chhandog Upnishad 1.6.1).