This stop is essentially an 8' Echo Vox Humana, though Irwin, the only source to list both names, lists them separately. Each resonators is cylindrical, with a bell on top, the underside of which is slotted. Wedgwood report that the example in Colston Hall �was intended to represent Madam Clara Butt's voice�. Irwin describes it as the softest reed stop in the organ, making �a mere whisper of high-pitched overtones that do little for the soft flue stops except add a fringe of tenuously pitched and mysterious harmonics to them�. Other stops which claim to be the softest are Dolcissimo, Echo Dulciana Celeste, Echo Gamba, Fernflöte, Viola d'Amore, and Vox Angelica.
Vox Mystica 8', Echo; Colston Hall, Bristol, England; Norman & Beard 1905.