Aum (also spelled om) is thought to include every single vibration which includes ever existed or will exist Later on. Additionally it is the energetic root of other, extended mantras. कामिनां बहु मन्तव्यं सङ्कल्पप्रभवोदयम् In present day spiritual movements, the idea of a "picked out mantra" or an "adjective mantra" https://mantra83826.win-blog.com/17116248/beej-mantra-secrets