Conversation so far:
What happened in 1987 to Depeche Mode?
Daniel Miller, who had produced Depeche Mode's previous album, Black Celebration, voluntarily stepped away from production duties for this album, citing the growing tension in the studio.

Question: what were some of the alterations?
Self-contained rewrite: What were some of the alterations made to recording Depeche Mode's Music for the Masses album?