Literature Reference: 翕然声作疑管裂，诎然声尽疑刀截。—— 《小童薛阳陶吹觱栗歌》 The sound suddenly rises as if the pipe were splitting, and abruptly ends as if cut by a knife. Source from 'The Song of Little Xue Yangtao Playing the Bili.'
翕: Gather, unite, and harmonize: a delicate flutter.
然: Affirmation and Promise. Herein lies a symbol of abundance, with wisdom in ample supply, venture forth with great auspiciousness.
Meaning: Harmonious and unified, describing the coordination of sound or movement.