 Although commonplace today, the effect bewitched audiences in the era before widespread recorded sound—after the initial 1918 run-through, Holst's daughter Imogen (in addition to watching the charwomen dancing in the aisles during Jupiter) remarked that the ending was "unforgettable, with its hidden chorus of women's voices growing fainter and fainter... until the imagination knew no difference between sound and silence".Several attempts have been made, for a variety of reasons, to append further music to Holst's suite, though by far the most common presentation of the music in the concert hall and on record remains Holst's original seven-movement version.Pluto was discovered in 1930, four years before Holst's death, and was hailed by astronomers as the ninth planet.