[Background only - deep bass baritone male] [Consistent low clean resonant humming] [Steady long tones - no variation in pitch] [No high notes] [No female voice] [No breathy sounds] [No lead melody] [Pure low atmospheric ooo aaaa uuu mmm] [Soft low echoes only] Ooooooooooooooooooooooooooooooo Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa Uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmm Ooooooooooooooooooooooooooooooo Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa Uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
