 Likewise, "Octandre" was recorded and issued on 78rpm discs in the later 1930s, complete (New Music Quarterly Recordings 1411) and as an excerpt (3rd movement, Columbia DB1791 in Volume V of their History of Music).Le Roy was the soloist also on a 1948 (78rpm) recording of "Density 21.5" (New Music Recordings 1000).When, in the late 1950s, Varèse was approached by a publisher about making "Ecuatorial" available, there were very few theremins—let alone fingerboard theremins—to be found, so he rewrote/relabelled the part for ondes Martenot.