"Before thou set'st thy foot upon the ladder's upper rung, the ladder of the mystic sounds, thou hast to hear the voice of thy inner GOD in seven manners.

"The first is like the nightingale's sweet voice chanting a song of parting to its mate. The second comes as the sound of a silver cymbal of the Dhyanis, awakening the twinkling stars. The next is as the plaint melodious of the ocean-sprite imprisoned in its shell. And this is followed by the chant of Vina. The fifth like sound of bamboo-flute shrills in thine ear. It changes next into a trumpet-blast. The last vibrates like the dull rumbling of a thunder-cloud.

"The seventh swallows all the other sounds. They die, and then are heard no more." ―The Voice of the Silence

Discover the kabbalistic significance of the seven mystical sounds, which symbolize how the soul or consciousness ascends, through the initiatic path, up the famous kabbalistic Tree of Life, specifically the seven inferior Sephiroth: Malkuth (physicality), Yesod (vitality), Hod (emotions), Netzach (mind), Tiphereth (willpower), Geburah (divine consciousness), and Chesed (Innermost Spirit, Atman). This lecture explains the relationship of the seven mystical sounds with the crucifixion of the Intimate Christ, whose seven esoteric utterances resound within the initiate dying to psychological impurity upon the sacrificial cross of alchemy.

Resources and References:

https://chicagognosis.org/lectures/the-seven-sounds