Giulio Bas was best known for his Gregorian accompaniments. Here’s a biography of him written in 1907 (approximately a decade before his accompaniments began to appear):
* * 1907 Biography of Julius Bas
“Is it not true that prohibiting or suspecting the extraordinary form can only be inspired by the demon who desires our suffocation and spiritual death?” —The Vatican’s chief liturgist from 2014-2021; interview with Edw. Pentin (23-Sep-2019)